JPH0362936B2 - - Google Patents
Info
- Publication number
- JPH0362936B2 JPH0362936B2 JP59230631A JP23063184A JPH0362936B2 JP H0362936 B2 JPH0362936 B2 JP H0362936B2 JP 59230631 A JP59230631 A JP 59230631A JP 23063184 A JP23063184 A JP 23063184A JP H0362936 B2 JPH0362936 B2 JP H0362936B2
- Authority
- JP
- Japan
- Prior art keywords
- pulley
- endless belt
- fixed
- power transmission
- movable
- 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.)
- Expired - Lifetime
Links
Landscapes
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
- Transmissions By Endless Flexible Members (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は動力の伝達速度を可変とした動力伝達
機構に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a power transmission mechanism in which the transmission speed of power is variable.
（従来の技術）
従来から動力の伝達速度を可変とした動力伝達
機構として第１図に示す如き構成のものが知られ
ている。(Prior Art) A structure as shown in FIG. 1 has been known as a power transmission mechanism in which the transmission speed of power is variable.
即ち、駆動プーリ１及び被動プーリ２間に無端
ベルト３を掛け渡すとともに、駆動プーリ１を固
定プーリ半体４及び可動プーリ半体５にて構成
し、被動プーリ２も同様に固定プーリ半体６及び
可動プーリ半体７にて構成し、且つ各固定プーリ
半体４，６を無端ベルト３に対してたすき状とな
るように配置している。そして、低速（Low・
Ratio）にて動力を伝達するには駆動プーリ１を
構成する可動プーリ半体５を固定プーリ半体４か
ら離して駆動プーリ１の径を小とし、被動プーリ
２を構成する可動プーリ半体７を固定プーリ半体
６に近づけて被動プーリ２の径を大とした状態で
動力伝達を行い、また高速（High・Ratio）にて
動力を伝達するには駆動プーリ１を構成する可動
プーリ半体５を固定プーリ半体４に近づけて駆動
プーリ１の径を大とし、被動プーリ２を構成する
可動プーリ半体７を固定プーリ半体６から離して
被動プーリ２の径を小とした状態で動力伝達を行
うようにしている。 That is, an endless belt 3 is stretched between a driving pulley 1 and a driven pulley 2, and the driving pulley 1 is composed of a fixed pulley half 4 and a movable pulley half 5, and the driven pulley 2 is also composed of a fixed pulley half 6. and a movable pulley half 7, and each fixed pulley half 4, 6 is arranged in a sash-like manner with respect to the endless belt 3. And low speed (Low・
In order to transmit power with a ratio of The drive pulley 2 is moved closer to the fixed pulley half 6 to increase the diameter of the driven pulley 2 to transmit power, and in order to transmit power at high speed (High Ratio), the movable pulley half that constitutes the drive pulley 1 is used. 5 closer to the fixed pulley half 4 to increase the diameter of the driving pulley 1, and move the movable pulley half 7 constituting the driven pulley 2 away from the fixed pulley half 6 to reduce the diameter of the driven pulley 2. It is designed to transmit power.
（発明医が解決しようとする問題点）
上述した従来の動力伝達機構にあつては、各固
定プーリ半体４，６をたすき状に配置すること
で、同一側に配置した場合よりも変速に伴う無端
ベルト３のずれ量を小さくし、片減りを抑制して
いるが、従来にあつては、Low・Ratioの状態で
無端ベルトのずれが零となるようにセツトしてい
るため、以下に述べる理由で十分に片減りの抑制
を行えない。(Problem to be Solved by the Inventor) In the conventional power transmission mechanism described above, by arranging the fixed pulley halves 4 and 6 in a sash shape, the speed change becomes easier than when the fixed pulley halves 4 and 6 are arranged on the same side. This reduces the amount of deviation of the endless belt 3 and suppresses uneven wear, but conventionally the endless belt is set so that the deviation is zero in the Low Ratio state, so the following For the reasons mentioned above, it is not possible to sufficiently suppress uneven wear.
即ち、第２図Ａは駆動プーリ１を小径に被動プ
ーリ２を大径としたLow・Ratioの状態を示し、
第２図Ｂは駆動プーリ１と被動プーリ２の径を
１：１とし、第２図Ａの状態よりもHigh・Ratio
の状態にしたものであり、この状態の変化により
駆動プーリ１の半径はΔrだけ大となり、被動プ
ーリ２の半径はΔr′だけ小となる。ここで、無端
ベルト３の全長は一定であるため、所定の張力を
もつて動力伝達を行うにはΔr＞Δr′としなければ
ならない。 That is, FIG. 2A shows a Low Ratio state in which the drive pulley 1 has a small diameter and the driven pulley 2 has a large diameter.
In Fig. 2B, the diameter of the driving pulley 1 and driven pulley 2 is set to 1:1, and the ratio is higher than that in Fig. 2A.
Due to this change in state, the radius of the driving pulley 1 increases by Δr, and the radius of the driven pulley 2 decreases by Δr'. Here, since the total length of the endless belt 3 is constant, Δr>Δr' must be satisfied in order to transmit power with a predetermined tension.
一方、第３図Ａ及びＢは上記状態変化における
無端ベルト３とプーリ１，２との関係を示す断面
図を示し、図中αはプーリの傾斜面の角度であ
り、無端ベルト３ａは変化前を、無端ベルト３ｂ
は変化後を示す。そして、駆動プーリ１の部分に
おける無端ベルトの横方向の移動量ｌはｌ＝Δr
tanαとなり、被動プーリ２の部分における移動
量l′はl′＝Δr′tanαとなる。ここで前記した如くΔ
r
＞Δr′であるため、ｌ＞l′となり第４図に示す如
く無端ベルトの中心線３ａは、駆動プーリ１及び
被動プーリ２のプーリ回転軸１ａ，２ａに直交す
る垂直線ｈに対し、｜ｌ−l′｜分だけずれること
になる。 On the other hand, FIGS. 3A and 3B show cross-sectional views showing the relationship between the endless belt 3 and the pulleys 1 and 2 in the above state change. In the figure, α is the angle of the slope of the pulley, and the endless belt 3a is , endless belt 3b
indicates after the change. Then, the amount of lateral movement l of the endless belt at the drive pulley 1 is l=Δr
tanα, and the amount of movement l' in the driven pulley 2 portion becomes l'=Δr'tanα. Here, as mentioned above, Δ
r
>Δr', l>l', and as shown in FIG. 4, the center line 3a of the endless belt is | The difference will be l−l′|.
その結果Low・RatioとHigh・Ratioとの変化
を頻繁に行うと、例えば金属ベルトにおいては横
剛性が高い為、無理な力が加わる等で、無端ベル
トの寿命が短くなるという問題がある。 As a result, if the Low Ratio and High Ratio are frequently changed, for example, metal belts have high lateral rigidity, so excessive force is applied to the belts, resulting in a problem that the life of the endless belt is shortened.
（問題点を解決するための手段）
上記問題点を解決するため、本発明は、駆動プ
ーリおよび可動プーリのそれぞれプーリ回転軸に
固定された固定プーリ半体とプーリ回転軸に軸方
向移動可能に支持された可動プーリ半体とによつ
て構成し、各固定プーリ半体を無端ベルトに対し
てそれぞれが反対側の位置するたすき状とすると
ともに、最高速の動力伝達速度比の状態と最低速
の動力伝達速度比の状態とで無端ベルトの中心線
がプーリ回転軸と直交する垂直線に対してそれぞ
れ逆側に傾くように各固定プーリをオフセツト
し、無端ベルトの偏磨耗を防止して耐久性を改善
する。(Means for Solving the Problems) In order to solve the above problems, the present invention provides a fixed pulley half fixed to the pulley rotation shaft of the drive pulley and a movable pulley, and a pulley rotation shaft movable in the axial direction. It consists of a supported movable pulley half, and each fixed pulley half is positioned in a sash shape on the opposite side with respect to the endless belt, and the state of the power transmission speed ratio of the highest speed and the lowest speed can be determined. With the power transmission speed ratio of improve sex.
（実施例）
以下に本発明の実施例を添付図面に基づいて説
明する。(Example) Examples of the present invention will be described below based on the accompanying drawings.
第５図は本発明に係る動力伝達機構をなす駆動
プーリ１１および被動プーリ１２を示す図であ
り、駆動プーリ１１と被動プーリ１２間には無端
ベルト１３が掛け渡される。例えば、車両にあつ
ては、駆動プーリ１１はエンジンのクランク軸に
連結され、被動プーリ１２は駆動輪に連結され
る。これら駆動プーリ１１および被動プーリ１２
はそれぞれ固定プーリ半体１４，１６および可動
プーリ半体１５，１７からなり、固定プーリ半体
１４，１６と可動プーリ半体１５，１７はそれぞ
れのテーパ面が対向する如く配置され、また固定
プーリ半体１４，１６は無端ベルト１３を基準と
してそれぞれが反対側となるように配置され、可
動プーリ半体１５，１７はプーリ１１，１２の軸
方向に進退動可能とされている。 FIG. 5 is a diagram showing a driving pulley 11 and a driven pulley 12 that constitute the power transmission mechanism according to the present invention, and an endless belt 13 is stretched between the driving pulley 11 and the driven pulley 12. For example, in a vehicle, the drive pulley 11 is connected to the crankshaft of the engine, and the driven pulley 12 is connected to the drive wheels. These driving pulley 11 and driven pulley 12
consists of fixed pulley halves 14, 16 and movable pulley halves 15, 17, respectively, and the fixed pulley halves 14, 16 and the movable pulley halves 15, 17 are arranged so that their respective tapered surfaces face each other, and the fixed pulley halves The halves 14 and 16 are arranged on opposite sides with respect to the endless belt 13, and the movable pulley halves 15 and 17 are movable forward and backward in the axial direction of the pulleys 11 and 12.
而して、第５図の実線で示す位置に可動プーリ
半体１５，１７が位置する場合には、駆動プーリ
１１の径は小径で、被動プーリ１２の径は大径と
なるのでLow・Ratioとなり、また、想像線で示
す位置に可動プーリ半体１５，１７が位置する場
合には、駆動プーリ１１の径は大径で、被動プー
リ１２の径は小径となるのでHigh・Ratioとな
る。そして斯るLow・Ratioと間の変化により、
無端ベルト１３の中心線はプーリ回転軸１１ａ，
１２ａに対する垂直線ｈから駆動プーリ１１の部
分にあつてはＬ、被動プーリ１２の部分にあつて
はL′だけ巾方向に移動する。 Therefore, when the movable pulley halves 15 and 17 are located at the positions shown by the solid lines in FIG. Further, when the movable pulley halves 15 and 17 are located at the positions shown by the imaginary lines, the diameter of the driving pulley 11 is large and the diameter of the driven pulley 12 is small, resulting in a High Ratio. And due to the change between Low and Ratio,
The center line of the endless belt 13 is the pulley rotating shaft 11a,
The driving pulley 11 portion is moved by L, and the driven pulley 12 portion is moved by L' in the width direction from the perpendicular line h to 12a.
ところで、本発明にあつては、第６図乃至第８
図に示す如く固定プーリ半体１４，１６を予めプ
ーリ１１，１２の軸１１ａ，１２ａ方向に沿つて
オフセツトしている。 By the way, in the present invention, FIGS. 6 to 8
As shown in the figure, the fixed pulley halves 14 and 16 are offset in advance along the axes 11a and 12a of the pulleys 11 and 12.
ここで、第６図はLow・Ratioの状態で示すも
のであり、この状態では無端ベルト１３は図中右
傾しており、第７図はHigh・Ratioの状態を示す
ものであり、この状態では無端ベルト１３は図中
左傾している。また第８図は無端ベルト１３の傾
きと速度比との関係を示す図である。 Here, FIG. 6 shows a state of Low Ratio, in which the endless belt 13 is tilted to the right in the figure, and FIG. 7 shows a state of High Ratio, in which The endless belt 13 is tilted to the left in the figure. Further, FIG. 8 is a diagram showing the relationship between the inclination of the endless belt 13 and the speed ratio.
固定プーリ半体１４，１６のプーリ回転軸１１
ａ，１２ａ方向のオフセツト量l1，l2は、最も使
用頻度の高い速度比Ａにおいて、無端ベルト１３
の中心線１３ａと、プーリ回転軸１１ａ，１２ａ
に直交する垂直線ｈとのずれが略々零となるよう
設定する。 Pulley rotating shaft 11 of fixed pulley halves 14 and 16
The offset amounts l 1 and l 2 in the a and 12a directions are the same as those of the endless belt 13 at the most frequently used speed ratio A.
center line 13a and pulley rotating shafts 11a, 12a
It is set so that the deviation from the vertical line h perpendicular to is approximately zero.
その結果、Low・RatioとHigh・Ratioとの間
において動力伝達速度比の変化をなす場合、最も
使用頻度の高い速度比Ａを中心として、無端ベル
ト１３は左右反対方向に傾くことなり、平均的に
は常時無端ベルト１３に傾きが無い状態で使用し
たと同じこととなる。 As a result, when the power transmission speed ratio changes between Low Ratio and High Ratio, the endless belt 13 tilts in opposite directions to the left and right, centering on the most frequently used speed ratio A, and the average This is the same as if the endless belt 13 were always used without any inclination.
（発明の効果）
以上に説明した如く本発明によれば、プーリ回
転軸に固定された固定プーリ半体とプーリ回転軸
に軸方向移動可能に支持された可動プーリ半体と
によつて無端ベルトを掛け渡す駆動プーリ及び被
動プーリを構成し、可動プーリ半体と固定プーリ
半体に対し接離動することで伝達速度を可変とし
た動力伝達機構において、該固定プーリ半体を最
も使用頻度の高い速度比において無端ベルトのず
れが略々零となるようにオフセツトしたため、伝
達速度の変化に伴つて無端ベルトが片減りするこ
となく、均一に摩耗する。したがつて無端ベルト
の寿命を大幅に延長せしめることが可能となる。(Effects of the Invention) As explained above, according to the present invention, the endless belt is formed by the fixed pulley half fixed to the pulley rotation shaft and the movable pulley half supported axially movably on the pulley rotation shaft. In a power transmission mechanism that consists of a driving pulley and a driven pulley that span a movable pulley half and a fixed pulley half, the transmission speed is variable by moving toward and away from a movable pulley half and a fixed pulley half. Since the endless belt is offset so that the deviation of the endless belt becomes almost zero at a high speed ratio, the endless belt does not wear out unevenly as the transmission speed changes, and wears out uniformly. Therefore, it is possible to significantly extend the life of the endless belt.
第１図は従来の動力伝達機構のLow・Ratioの
状態を示す図、第２図Ａ及びＢは従来の動力伝達
機構の伝達速度の変化の前後を示す図、第３図Ａ
及びＢは従来の動力伝達機構において伝達速度を
変化させた際のプーリと無端ベルトとの関係を示
す図、第４図は従来機構における無端ベルトと速
度比の関係を示す図、第５図は本発明の動力伝達
機構を示す図、第６図及び第７図は本発明に係る
動力伝達機構の伝達速度の変化の前後の状態を示
す図、第８図は本発明に係る動力伝達機構におけ
る無端ベルトと速度比との関係を示す図である。
尚、図中、１１は駆動プーリ、１２は被動プー
リ、１３は無端ベルト、１４，１６は固定プーリ
半体、１５，１７は可動プーリ半体である。
Figure 1 is a diagram showing the Low Ratio state of a conventional power transmission mechanism, Figure 2 A and B are diagrams showing before and after changes in transmission speed of a conventional power transmission mechanism, Figure 3 A
and B are diagrams showing the relationship between the pulley and the endless belt when changing the transmission speed in a conventional power transmission mechanism, Figure 4 is a diagram showing the relationship between the endless belt and the speed ratio in the conventional mechanism, and Figure 5 is a diagram showing the relationship between the endless belt and the speed ratio in the conventional mechanism. FIGS. 6 and 7 are diagrams showing the power transmission mechanism of the present invention before and after the transmission speed changes, and FIG. 8 is a diagram showing the power transmission mechanism of the present invention before and after a change in transmission speed. It is a figure showing the relationship between an endless belt and a speed ratio. In the figure, 11 is a driving pulley, 12 is a driven pulley, 13 is an endless belt, 14 and 16 are fixed pulley halves, and 15 and 17 are movable pulley halves.
Claims (1)
定するとともに可動プーリ半体を軸方向移動可能
に取り付けて駆動プーリを構成するとともに、被
動側のプーリ回転軸に固定プーリ半体を固定する
とともに可動プーリ半体を軸方向移動可能に取り
付けて被動プーリを構成し、駆動プーリと被動プ
ーリとの間に無端ベルトを掛設するとともに、駆
動プーリの固定プーリ半体と被動プーリの固定プ
ーリ半体とを互いに無端ベルトに対し幅方向の異
なる側に配置し、駆動プーリの可動プーリ半体と
被動プーリの可動プーリ半体とをそれぞれプーリ
回転軸の軸方向に移動させて動力伝達速度比を変
える動力伝達機構において、 最高速の動力伝達速度比の状態と最低速の動力
伝達速度比の状態とで前記無端ベルトの中心線が
プーリ回転軸と直交する垂直線に対しそれぞれ逆
側に傾くように前記各固定プーリを予めオフセツ
トしたことを特徴とする動力伝達機構。[Scope of Claims] 1. A fixed pulley half is fixed to the drive-side pulley rotation shaft, and a movable pulley half is attached so as to be movable in the axial direction to constitute a drive pulley, and a fixed pulley is fixed to the driven-side pulley rotation shaft. The driven pulley is constructed by fixing the half body and attaching the movable pulley half so that it can move in the axial direction.An endless belt is hung between the driving pulley and the driven pulley, and the fixed pulley half of the driving pulley and the driven pulley The fixed pulley halves of the pulley are arranged on different sides in the width direction with respect to the endless belt, and the movable pulley half of the drive pulley and the movable pulley half of the driven pulley are respectively moved in the axial direction of the pulley rotation axis. In a power transmission mechanism that changes the power transmission speed ratio, the center line of the endless belt is in a state of the highest power transmission speed ratio and a state of the lowest power transmission speed ratio with respect to a vertical line perpendicular to the pulley rotation axis, respectively. A power transmission mechanism characterized in that each of the fixed pulleys is offset in advance so as to tilt in the opposite direction.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23063184A JPS61109950A (en) | 1984-11-01 | 1984-11-01 | power transmission mechanism |
| US06/780,118 US4673379A (en) | 1984-09-26 | 1985-09-25 | Infinitely variable transmission |
| EP85306861A EP0176367A1 (en) | 1984-09-26 | 1985-09-26 | Infinitely variable transmission |
| EP88109193A EP0318635B1 (en) | 1984-09-26 | 1985-09-26 | Infinitely variable transmission |
| DE8888109193T DE3582806D1 (en) | 1984-09-26 | 1985-09-26 | STEPLESS GEARBOX. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23063184A JPS61109950A (en) | 1984-11-01 | 1984-11-01 | power transmission mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61109950A JPS61109950A (en) | 1986-05-28 |
| JPH0362936B2 true JPH0362936B2 (en) | 1991-09-27 |
Family
ID=16910808
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23063184A Granted JPS61109950A (en) | 1984-09-26 | 1984-11-01 | power transmission mechanism |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61109950A (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5727557U (en) * | 1980-07-22 | 1982-02-13 |
-
1984
- 1984-11-01 JP JP23063184A patent/JPS61109950A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61109950A (en) | 1986-05-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |