JPH05149400A - Belt type continuously variable transmission - Google Patents
Belt type continuously variable transmissionInfo
- Publication number
- JPH05149400A JPH05149400A JP31033091A JP31033091A JPH05149400A JP H05149400 A JPH05149400 A JP H05149400A JP 31033091 A JP31033091 A JP 31033091A JP 31033091 A JP31033091 A JP 31033091A JP H05149400 A JPH05149400 A JP H05149400A
- Authority
- JP
- Japan
- Prior art keywords
- pulley body
- movable pulley
- transmission
- fixed
- cam mechanism
- 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
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
- F16H63/04—Final output mechanisms therefor; Actuating means for the final output mechanisms a single final output mechanism being moved by a single final actuating mechanism
- F16H63/06—Final output mechanisms therefor; Actuating means for the final output mechanisms a single final output mechanism being moved by a single final actuating mechanism the final output mechanism having an indefinite number of positions
- F16H63/067—Final output mechanisms therefor; Actuating means for the final output mechanisms a single final output mechanism being moved by a single final actuating mechanism the final output mechanism having an indefinite number of positions mechanical actuating means
-
- 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
- F16H9/00—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members
- F16H9/02—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion
- F16H9/04—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion using belts, V-belts, or ropes
- F16H9/12—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion using belts, V-belts, or ropes engaging a pulley built-up out of relatively axially-adjustable parts in which the belt engages the opposite flanges of the pulley directly without interposed belt-supporting members
- F16H9/16—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion using belts, V-belts, or ropes engaging a pulley built-up out of relatively axially-adjustable parts in which the belt engages the opposite flanges of the pulley directly without interposed belt-supporting members using two pulleys, both built-up out of adjustable conical parts
- F16H9/18—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion using belts, V-belts, or ropes engaging a pulley built-up out of relatively axially-adjustable parts in which the belt engages the opposite flanges of the pulley directly without interposed belt-supporting members using two pulleys, both built-up out of adjustable conical parts only one flange of each pulley being adjustable
-
- 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
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
- F16H63/04—Final output mechanisms therefor; Actuating means for the final output mechanisms a single final output mechanism being moved by a single final actuating mechanism
- F16H63/06—Final output mechanisms therefor; Actuating means for the final output mechanisms a single final output mechanism being moved by a single final actuating mechanism the final output mechanism having an indefinite number of positions
- F16H63/062—Final output mechanisms therefor; Actuating means for the final output mechanisms a single final output mechanism being moved by a single final actuating mechanism the final output mechanism having an indefinite number of positions electric or electro-mechanical actuating means
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmissions By Endless Flexible Members (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ベルト式無段変速装置
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】従来のベルト式無段変速装置では、例え
ば、特開平３−１９１７０７号公報に開示されるよう
に、伝動ベルトが巻回されるプーリを軸芯方向の間隔が
変更可能な割りプーリ式に構成し、可動カムを回動操作
することで固定カムとの間の傾斜カム面により、可動カ
ムが軸芯方向に移動して可動側プーリをスライド操作す
るよう構成したものがあった。2. Description of the Related Art In a conventional belt type continuously variable transmission, for example, as disclosed in Japanese Unexamined Patent Publication No. 3-191707, a pulley around which a transmission belt is wound is arranged with a variable spacing in the axial direction. There is a pulley type structure in which the movable cam moves in the axial direction to slide the movable pulley by the inclined cam surface between the fixed cam and the movable cam when the movable cam is rotated. .
【０００３】[0003]
【発明が解決しようとする課題】ところが、上記従来構
造においては、プーリ間隔を狭くする方向への操作で
は、伝動ベルトの張力によりプーリ間隔が広がる方向に
向けて可動側プーリが押し作用される力に抗して、可動
カムを回動操作しなければならず、大きな操作力が必要
で、人為操作で行う場合には、人為操作が重く操作性に
欠ける欠点があり、又、アクチュエータを用いて操作す
る場合であっても、アクチュエータの駆動操作力を大に
設定するので、アクチュエータが大型化する欠点があっ
た。又、ベアリング等に過大なスラスト力が作用して発
熱して耐久性が悪くなる等の弊害もあった。本発明は簡
単な構造改良によって上記不具合点を解消することを目
的としている。However, in the above-mentioned conventional structure, in the operation in the direction of narrowing the pulley gap, the force exerted on the movable pulley in the direction of expanding the pulley gap by the tension of the transmission belt. The movable cam must be rotated to counteract the above, and a large operation force is required. When performing by manual operation, there is a drawback that the manual operation is heavy and lacks in operability. Even when it is operated, the driving operation force of the actuator is set to a large value, so that there is a drawback that the actuator becomes large. Further, there is also a problem that excessive thrust force acts on the bearing and the like to generate heat and deteriorate durability. An object of the present invention is to solve the above problems by a simple structural improvement.
【０００４】[0004]
【課題を解決するための手段】本発明の特徴構成は、伝
動ベルトが巻回されるプーリを、軸芯方向に位置固定な
固定プーリと軸芯方向にスライド操作自在な可動プーリ
により割りプーリ式に構成するとともに、前記可動プー
リを操作カム機構を介して軸芯方向にスライド操作する
よう構成し、この可動プーリを伝動軸に遊転自在に外嵌
して、伝動軸と可動プーリとを、伝動回転力により前記
可動プーリを固定プーリ側に押圧作用する分力を発生さ
せるカム機構を介してトルク伝達可能に連動連係させて
ある点にある。A characteristic configuration of the present invention is that a pulley around which a transmission belt is wound is divided into a fixed pulley that is positionally fixed in the axial direction and a movable pulley that is slidable in the axial direction. In addition to the above, the movable pulley is configured to be slid in the axial direction through the operation cam mechanism, and the movable pulley is fitted onto the transmission shaft so as to be freely rotatable, and the transmission shaft and the movable pulley are The point is that the movable pulley is linked and linked so as to be able to transmit torque via a cam mechanism that generates a component force that presses the movable pulley toward the fixed pulley by the rotational force.
【０００５】[0005]
【作用】原動部からの動力が、例えば伝動軸を介して与
えられると、その動力は前記カム機構を介して可動プー
リに伝えられるが、このとき、そのカム機構において、
駆動トルクにより可動プーリが固定プーリ側に向かう分
力が発生し、プーリ間隔を狭くする側に向けて常時押し
作用する力が生じることになる。その結果、変速作動の
為に、操作カム機構をプーリ間隔が狭くなる方向に操作
する場合には、その操作力が上記駆動トルクによる補助
押し力に相当する分だけ軽くすることができる。When the power from the prime mover is applied, for example, via the transmission shaft, the power is transmitted to the movable pulley via the cam mechanism. At this time, in the cam mechanism,
Due to the driving torque, a component force that the movable pulley moves toward the fixed pulley is generated, and a force that constantly pushes toward the side where the pulley interval is narrowed is generated. As a result, when the operation cam mechanism is operated in the direction in which the pulley interval is narrowed for gear shift operation, the operation force can be reduced by an amount corresponding to the auxiliary pushing force by the drive torque.
【０００６】[0006]
【発明の効果】従って、伝動駆動力の回転トルクを有効
利用して、カム機構等の簡易な構造を付加するだけの簡
単な改良によって、変速操作力が小さいものに抑制でき
て、操作が軽く行えるとともに、操作カム機構やベアリ
ング等の部材に対する軸芯方向の操作反力も軽減でき、
耐久性が向上するという効果も奏する。Therefore, by effectively utilizing the rotational torque of the transmission driving force, a simple modification such as adding a simple structure such as a cam mechanism can suppress the gear shifting operation force to a small one, and the operation is light. In addition to being able to do it, the operation reaction force in the axial direction with respect to the members such as the operation cam mechanism and the bearing can be reduced,
It also has the effect of improving durability.
【０００７】[0007]
【実施例】以下、実施例を図面に基いて説明する。図２
に乗用型田植機の伝動構造を示している。搭載エンジン
１の出力軸２〔伝動軸の一例〕とミッションケース３の
入力軸４〔伝動軸の他の例〕との間にベルト式無段変速
装置５を介装するとともに、ミッションケース３から図
示しない走行車輪及び作業装置に動力伝達するよう伝動
系を構成してある。Embodiments will be described below with reference to the drawings. Figure 2
Shows the transmission structure of the riding rice transplanter. A belt-type continuously variable transmission 5 is interposed between an output shaft 2 [an example of a transmission shaft] of an on-board engine 1 and an input shaft 4 [another example of a transmission shaft] of a mission case 3, and from the transmission case 3 A transmission system is configured to transmit power to traveling wheels and a working device (not shown).
【０００８】前記無段変速装置５は、伝動ベルト６を巻
回張設する夫々のプーリ７，８を、回転軸芯方向にプー
リ間隔を変更操作自在な割りプーリ式に構成してあり、
夫々のプーリ間隔を背反的に変更させて変速操作するよ
う構成してある。詳述すると、図１に示すように、前記
各プーリ７，８は、前記各軸２，４に一体回転自在に外
嵌され軸芯方向に位置固定状態で配設した固定プーリ体
９と、軸芯方向にスライド操作自在な可動プーリ体１０
〔伝動部材の一例〕とで構成され、各可動プーリ体１０
を乗り上がりカム機構１１を介して一体的にスライド操
作するよう構成してある。各固定プーリ体９は、伝動ベ
ルト６に対して互い反対側に位置するよう配備され、か
つ、可動プーリ体１０は互いに逆方向、つまり、プーリ
間隔が広がる方向と狭まる方向とに一体操作されるよう
にして、スライド操作に伴って伝動ベルト幅中心線が夫
々のプーリ７，８において平行状態を維持するよう位置
を設定してある。In the continuously variable transmission 5, each of the pulleys 7 and 8 around which the transmission belt 6 is wound and stretched is a split pulley type in which the pulley spacing can be changed in the direction of the axis of rotation.
It is configured such that the respective pulley intervals are changed in a contradictory manner for gear shifting operation. More specifically, as shown in FIG. 1, the pulleys 7 and 8 are fixedly mounted on the shafts 2 and 4 so as to be integrally rotatable, and fixed pulley bodies 9 are arranged in a fixed position in the axial direction. Movable pulley body 10 slidable in the axial direction
[Example of transmission member] and each movable pulley body 10
Is configured to be integrally slid through the riding cam mechanism 11. The fixed pulley bodies 9 are arranged so as to be located on opposite sides of the transmission belt 6, and the movable pulley bodies 10 are integrally operated in mutually opposite directions, that is, in a direction in which the pulley interval increases and a direction in which the pulley interval narrows. In this way, the position is set such that the center line of the width of the transmission belt is kept parallel to each of the pulleys 7 and 8 in accordance with the sliding operation.
【０００９】前記各乗り上がりカム機構１１〔操作カム
機構の一例〕は、図３にも示すように、固定支持部１
２，１３により位置固定状態で支持された固定カム１１
ａに対して相対回動自在に係合する可動カム１１ｂから
プーリ外端よりも径方向外方に操作アーム１４，１５を
延設して構成され、入出力側夫々の操作アーム１４，１
５を、棒材を略Ｚ字形に屈曲成形し、伝動ベルト６の上
方を迂回する状態で配設した操作ロッド１６を介して連
動連結してある。又、この操作ロッド１６の一端部を電
動シリンダ１７により押し引き駆動できるよう枢支連結
し、電動シリンダ１７を伸縮駆動することで変速操作を
行えるよう構成してある。Each of the riding cam mechanisms 11 (an example of the operation cam mechanism) has a fixed support portion 1 as shown in FIG.
Fixed cam 11 supported in a fixed position by 2 and 13
The operating arms 14 and 15 are arranged to extend radially outward from the outer end of the pulley from the movable cam 11b that is engaged with the a in a relatively rotatable manner.
5 is formed by bending a bar material into a substantially Z shape, and is interlockingly connected via an operation rod 16 arranged in a state of detouring above the transmission belt 6. Further, one end of the operating rod 16 is pivotally connected so that it can be driven by pushing and pulling by the electric cylinder 17, and the electric cylinder 17 is extended / contracted so that the shift operation can be performed.
【００１０】前記各可動プーリ体１０は、前記各軸２，
４に対して遊転自在に外嵌してあり、固定プーリ体９と
は反対側箇所において、軸に対してキー１８を介して一
体回転自在並びに軸芯方向に位置固定状態に外嵌装着し
た伝動部材１９と、可動プーリ体１０の側面との間に回
転トルクを伝達可能なカム機構２０を形成してある。図
４に示すように、このカム機構２０は、咬合係合面を斜
め形状に形成して、伝動回転力により可動プーリ体１０
を固定プーリ体９側に押圧作用する分力を発生させるよ
う構成してある。つまり、軸側から回転動力が伝わると
軸側押圧作用カム面部分２１ａにおいて、伝動部材側カ
ム部が可動プーリ体側カム部を固定プーリ体９側に押し
作用する分力が発生し、伝動ベルト６側から回転動力が
伝わると軸側押圧作用カム面部分と反対側の押圧作用カ
ム面部分２１ｂにおいて、可動プーリ体側カム部が伝動
部材側カム部を固定プーリ体９とは反対側に押し作用す
る分力が発生するが、伝動部材１９は位置固定であるか
ら、その反力により可動プーリ体側カム部が固定プーリ
体９側に押し作用されることになる。但し、前記カム機
構２０による軸芯方向の分力は伝動ベルト６の張力によ
るプーリ押し開き力よりも大きくならないように設定し
てある。このように構成すると、前記カム機構２０によ
り発生する補助力により、乗り上がりカム機構１１にお
けるプーリ間隔を狭くする方向への電動シリンダ１７の
駆動力を小さいものに抑制することができ、小型の電動
シリンダ１７を用いることができる。Each of the movable pulley bodies 10 is connected to each of the shafts 2,
4 is freely rotatably fitted on the outer circumference of the shaft 4, and is mounted on the side opposite to the fixed pulley body 9 so as to be integrally rotatable with respect to the shaft through the key 18 and fixed in the axial direction. A cam mechanism 20 capable of transmitting rotational torque is formed between the transmission member 19 and the side surface of the movable pulley body 10. As shown in FIG. 4, the cam mechanism 20 has an occlusal engagement surface formed in an oblique shape, and the movable pulley body 10 is formed by a transmission rotational force.
Is configured to generate a component force for pressing the fixed pulley body 9 side. That is, when the rotational power is transmitted from the shaft side, a component force is generated in the shaft-side pressing cam surface portion 21a in which the transmission member-side cam portion pushes the movable pulley body-side cam portion toward the fixed pulley body 9 side, and the transmission belt 6 When the rotational power is transmitted from the side, the movable pulley body side cam portion pushes the transmission member side cam portion to the side opposite to the fixed pulley body 9 in the pushing side acting cam surface portion 21b opposite to the shaft side pushing acting cam surface portion. Although a component force is generated, since the position of the transmission member 19 is fixed, the cam force of the movable pulley body side is pushed toward the fixed pulley body 9 side by its reaction force. However, the component force in the axial direction by the cam mechanism 20 is set so as not to be larger than the pulley pushing open force due to the tension of the transmission belt 6. According to this structure, the driving force of the electric cylinder 17 in the direction in which the pulley interval in the riding cam mechanism 11 is narrowed can be suppressed to a small value by the assisting force generated by the cam mechanism 20, and a small electric motor can be used. The cylinder 17 can be used.
【００１１】〔別実施例〕前記乗り上がりカム機構１１
は、図５に示すように、固定カムに転動ローラ２２を用
いる構成としてもよい。[Other Embodiment] The riding cam mechanism 11
Alternatively, as shown in FIG. 5, the rolling roller 22 may be used as the fixed cam.
【００１２】尚、特許請求の範囲の項に図面との対照を
容易にするために符号を記すが、該記入により本発明は
添付図面の構成に限定されるものではない。It should be noted that reference numerals are added to the claims for facilitating the comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.
【図１】ベルト無段変速装置の断面図FIG. 1 is a sectional view of a belt continuously variable transmission.
【図２】田植機の前部の側面図[Figure 2] Side view of the front of rice transplanter
【図３】操作カム機構の正面図FIG. 3 is a front view of an operation cam mechanism.
【図４】カム機構の斜視図FIG. 4 is a perspective view of a cam mechanism.
【図５】別実施例の操作カム機構の平面図FIG. 5 is a plan view of an operation cam mechanism of another embodiment.
６ 伝動ベルト ７，８ プーリ ９ 固定プーリ体 １０ 可動プーリ体 １１ 操作カム機構 ２０ カム機構 6 transmission belt 7, 8 pulley 9 fixed pulley body 10 movable pulley body 11 operation cam mechanism 20 cam mechanism
Claims (1)
（７），（８）を、軸芯方向に位置固定な固定プーリ体
（９）と軸芯方向にスライド操作自在な可動プーリ体
（１０）により割りプーリ式に構成するとともに、前記
可動プーリ体（１０）を操作カム機構（１１）を介して
軸芯方向にスライド操作するよう構成し、この可動プー
リ体（１０）を伝動軸に遊転自在に外嵌して、伝動軸と
可動プーリ体（１０）とを、伝動回転力により前記可動
プーリ体（１０）を固定プーリ体（９）側に押圧作用す
る分力を発生させるカム機構（２０）を介してトルク伝
達可能に連動連係させてあるベルト式無段変速装置。1. A fixed pulley body (9), which is fixed in position in the axial direction, and a movable pulley body, in which the pulleys (7), (8) around which a transmission belt (6) is wound can be slidably operated in the axial direction. (10) is configured as a split pulley type, and the movable pulley body (10) is configured to be slid in the axial direction through the operation cam mechanism (11), and the movable pulley body (10) is used as a transmission shaft. It is loosely fitted onto the outer periphery of the movable shaft, and the transmission shaft and the movable pulley body (10) generate a component force for pressing the movable pulley body (10) toward the fixed pulley body (9) by the transmission rotational force. A belt-type continuously variable transmission that is interlockingly linked so that torque can be transmitted through a cam mechanism (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31033091A JPH05149400A (en) | 1991-11-26 | 1991-11-26 | Belt type continuously variable transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31033091A JPH05149400A (en) | 1991-11-26 | 1991-11-26 | Belt type continuously variable transmission |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05149400A true JPH05149400A (en) | 1993-06-15 |
Family
ID=18003939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31033091A Pending JPH05149400A (en) | 1991-11-26 | 1991-11-26 | Belt type continuously variable transmission |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05149400A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1184603A3 (en) * | 2000-09-04 | 2004-03-03 | Bando Chemical Industries, Ltd. | Variable speed control apparatus for automotive vehicles |
| ITTO20080529A1 (en) * | 2008-07-09 | 2010-01-10 | Cnh Italia Spa | VARIATION EQUIPMENT AND CONTROL OF THE ROTATION SPEED OF A MOTOR COOLING FAN |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0379845A (en) * | 1989-08-21 | 1991-04-04 | Bando Chem Ind Ltd | Pulley type transmission |
-
1991
- 1991-11-26 JP JP31033091A patent/JPH05149400A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0379845A (en) * | 1989-08-21 | 1991-04-04 | Bando Chem Ind Ltd | Pulley type transmission |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1184603A3 (en) * | 2000-09-04 | 2004-03-03 | Bando Chemical Industries, Ltd. | Variable speed control apparatus for automotive vehicles |
| ITTO20080529A1 (en) * | 2008-07-09 | 2010-01-10 | Cnh Italia Spa | VARIATION EQUIPMENT AND CONTROL OF THE ROTATION SPEED OF A MOTOR COOLING FAN |
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