JP2000352448A - Gear shift driving mechanism for v-belt type continuously variable transmission - Google Patents

Abstract

PROBLEM TO BE SOLVED: To advance and retreat a pushing/pressing member by a little driving force. SOLUTION: This continuously variable transmission 1 comprises fixed conical wheels 3A, 4A fixed on a rotary shaft and movable conical wheels 3B, 4B slidably and rotatably inserted in the rotary shaft 2, and in either a driving pulley 3 or a driven pulley 4, a pushing/pressing member 11 advanced/retreated in the axial line direction of a rotary shaft 2 by a driving means is arranged on the side of the movable conical wheel 3B in a manner that it can be relatively rotated against the movable conical wheel 3B and the rotary shaft thereof and pushes/presses or cancels to push/press the movable conical wheel 3B. In this case, inclined parts 22 inclined to the rotating direction of the rotary shaft 2 are arranged on one side of the movable conical wheel 3B pushed/ pressed by the pushing/pressing member 11 and the rotary shaft 2 thereof, and pushing/pressing pieces 23 abutting on the inclined parts 22 are arranged on the other side thereof, and also a spring 21 for pushing the movable conical wheel 3B to the side of the fixed conical wheel 3A is arranged between the movable conical wheel 3B and the rotary shaft 2 thereof.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、駆動側から従動側
への動力伝達を無段で変速するためのＶベルト式無段変
速機に関し、特に、そのようなＶベルト式無段変速機に
おいて、変速のために可動円錐車を進退させるための変
速駆動機構に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuously variable V-belt transmission for continuously changing the power transmission from a driving side to a driven side, and more particularly to such a V-belt continuously variable transmission. And a shift drive mechanism for moving a movable conical wheel forward and backward for shifting.

【０００２】[0002]

【従来の技術】自動車やオートバイ等の車両に適用され
る変速機構として、駆動側の回転軸に設けられる駆動プ
ーリーと、従動側の回転軸に設けられる従動プーリー
を、何れも、回転軸に固着される固定円錐車と、回転軸
に対して摺動可能な可動円錐車により構成して、無端の
Ｖベルトを巻き回した駆動プーリーと従動プーリーの何
れか一方に、駆動手段により回転軸の軸線方向に進退さ
れる押圧部材を、可動円錐車およびその回転軸に対して
相対回転自在で、且つ、可動円錐車を押圧又は押圧解除
するように、可動円錐車の側方に配置した、所謂Ｖベル
ト式無段変速機というものが従来から一般的に知られて
いる。2. Description of the Related Art As a transmission mechanism applied to vehicles such as automobiles and motorcycles, a drive pulley provided on a drive-side rotary shaft and a driven pulley provided on a driven-side rotary shaft are both fixed to the rotary shaft. And a movable conical wheel that is slidable with respect to the rotating shaft, and is provided with one of a driving pulley and a driven pulley around which an endless V-belt is wound, and an axis of the rotating shaft being driven by driving means. The pressing member which is moved forward and backward in the direction is rotatable relative to the movable conical wheel and its rotation axis, and is disposed beside the movable conical wheel so as to press or release the movable conical wheel. BACKGROUND ART A belt-type continuously variable transmission has been generally known from the past.

【０００３】そのようなＶベルト式無段変速機では、例
えば、駆動プーリーと従動プーリーの何れか一方におい
て、外周部に噛合歯、内周部にネジがそれぞれ刻設され
た環状板体を押圧部材とし、モーターを駆動手段とし
て、プーリーの回転軸と同軸で外周部にネジが刻設され
た送りネジ軸に対し、押圧部材のネジと送りネジ軸のネ
ジとを螺合させた状態で、押圧部材の噛合歯によりモー
ターの回転力を押圧部材に伝達させて、回転が阻止され
た送りネジ軸の上で、押圧部材を回転させながら回転軸
の軸線方向に沿って進退させることにより、押圧部材の
押圧又は押圧解除により可動円錐車を回転軸の軸線方向
に沿って進退させ、それにより固定円錐車と可動円錐車
の間隔を変化させることによって、Ｖベルトを介した駆
動プーリーから従動プーリーへの動力伝達を無段階で変
速するようにしている。In such a V-belt type continuously variable transmission, for example, one of a driving pulley and a driven pulley presses an annular plate body having a meshing tooth on an outer periphery and a screw on an inner periphery. As a member, with the motor as the driving means, in the state where the screw of the pressing member and the screw of the feed screw shaft are screwed to the feed screw shaft in which a screw is engraved on the outer periphery coaxially with the rotation axis of the pulley, By transmitting the rotational force of the motor to the pressing member by the meshing teeth of the pressing member, and moving the pressing member on the feed screw shaft, which is prevented from rotating, along the axial direction of the rotating shaft while rotating the pressing member, the pressing is performed. The movable pulley is advanced or retracted along the axial direction of the rotating shaft by pressing or releasing the member, thereby changing the distance between the fixed and the movable pulleys, thereby being driven by the drive pulley via the V-belt. The power transmission to the Ri are such that shift steplessly.

【０００４】[0004]

【発明が解決しようとする課題】ところで、上記のよう
な従来のＶベルト式無段変速機では、押圧部材の押圧力
のみにより可動円錐車からの反作用力を支持しているこ
とから、押圧部材を駆動するために必要な駆動力が大き
くなり、このことが設計上、様々な不利をもたらすこと
になる。In the conventional V-belt type continuously variable transmission as described above, the reaction force from the movable conical wheel is supported only by the pressing force of the pressing member. The driving force required to drive the motor increases, which causes various disadvantages in design.

【０００５】本発明は、上記のような問題の解消を課題
とするものであり、具体的には、Ｖベルト式無段変速機
の変速駆動機構について、押圧部材のみで可動円錐車か
らの反作用力を支持しないようにすることで、小さな駆
動力により押圧部材を進退させることができるようにす
ることを課題とするものである。SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems. More specifically, a shift driving mechanism of a V-belt type continuously variable transmission uses only a pressing member to react from a movable conical wheel. An object of the present invention is to make it possible to advance and retreat the pressing member with a small driving force by not supporting the force.

【０００６】[0006]

【課題を解決するための手段】本発明は、上記のような
課題を解決するために、上記の請求項１に記載したよう
に、無端Ｖベルトを巻き回した駆動プーリーと従動プー
リーのそれぞれが、回転軸に固着される固定円錐車と、
回転軸に摺動且つ回動可能に挿着される可動円錐車とか
らなり、駆動プーリーと従動プーリーの何れか一方で、
駆動手段により回転軸の軸線方向に進退される押圧部材
が、可動円錐車およびその回転軸に対してそれぞれ相対
回転可能で、且つ、可動円錐車を押圧又は押圧解除する
ように、可動円錐車の側方に配置されているＶベルト式
無段変速機において、押圧部材により押圧される可動円
錐車とその回転軸に対して、その何れか一方の側に回転
軸の回転方向に対して傾斜した傾斜部を設け、他方の側
に該傾斜部に当接する押圧子を設けると共に、該可動円
錐車とその回転軸との間に、可動円錐車を固定円錐車の
側に押し付けるためのスプリングを配設したことを特徴
とするものである。According to the present invention, in order to solve the above-mentioned problems, each of the driving pulley and the driven pulley around which the endless V-belt is wound has the structure described in claim 1 above. A fixed conical wheel fixed to the rotating shaft,
It consists of a movable conical wheel that is slidably and rotatably inserted on the rotating shaft, and either one of the drive pulley and the driven pulley,
The pressing member moved forward and backward in the axial direction of the rotating shaft by the driving means is rotatable relative to the movable conical wheel and the rotating shaft thereof, and presses or releases the movable conical wheel. In the V-belt type continuously variable transmission that is disposed on the side, the movable conical wheel pressed by the pressing member and the rotation axis thereof are inclined to one of the sides with respect to the rotation direction of the rotation axis. An inclined portion is provided, and a pressing element that contacts the inclined portion is provided on the other side, and a spring for pressing the movable conical wheel toward the fixed conical wheel is disposed between the movable conical wheel and its rotating shaft. It is characterized by having been provided.

【０００７】そのような構成によれば、可動円錐車とそ
の回転軸に設けられた傾斜部と押圧子の圧接により発生
する回転軸線方向の分力や、可動円錐車とその回転軸と
の間に介装されたスプリングのバネ力が、Ｖベルトの駆
動による可動円錐車からの反作用力に対抗するように働
くことから、押圧部材に働く可動円錐車からの反作用力
が大幅に軽減されることとなり、可動円錐車からの反作
用力を押圧部材のみにより支持させている場合と比べ
て、押圧部材を回転軸の軸線方向に押圧させるために必
要な駆動力を小さなもので済ますことができる。[0007] According to such a configuration, the component force in the direction of the rotation axis generated by the press contact between the movable cone wheel and the inclined portion provided on the rotation shaft thereof and the pressing element, and the force between the movable cone wheel and the rotation shaft. Since the spring force of the spring interposed acts against the reaction force from the movable cone wheel driven by the V-belt, the reaction force from the movable cone wheel acting on the pressing member is greatly reduced. As compared with the case where the reaction force from the movable conical wheel is supported only by the pressing member, the driving force required to press the pressing member in the axial direction of the rotating shaft can be reduced.

【０００８】なお、上記のような従来のＶベルト式無段
変速機では、モーターを駆動手段として押圧部材を進退
させるのに際して、モーターからの回転力を押圧部材に
伝達させて、回転が阻止された送りネジ軸の上で、押圧
部材を回転させながら回転軸の軸線方向に沿って進退さ
せていることから、モーターからの回転力を押圧部材に
伝達するための部材（押圧部材の噛合歯と噛合するモー
ター側の歯車）を、押圧部材の進退の移動範囲に応じて
その回転軸線方向で長くする必要があって、部材（歯
車）の幅が大きくなることでコストアップを招くことに
なる。In the conventional V-belt type continuously variable transmission as described above, when the pressing member is moved forward and backward by using the motor as the driving means, the rotational force from the motor is transmitted to the pressing member to prevent the rotation. Since the pressing member is advanced and retracted along the axis of the rotating shaft while rotating the pressing member on the feed screw shaft, a member for transmitting the rotational force from the motor to the pressing member (the meshing teeth of the pressing member and the It is necessary to lengthen the gear (the gear on the motor side that meshes) with the pressing member in the direction of the rotation axis in accordance with the range of movement of the pressing member, and the increase in the width of the member (gear) leads to an increase in cost.

【０００９】また、回転しながら進退する押圧部材を、
軸受を介した状態で、可動円錐車に当接させても、その
軸受は比較的大径なものとなり、そのような大径の軸受
を介して押圧部材に伝達される可動円錐車の回転力は、
大きなトルクとなって押圧部材に伝達されるため、その
ようなトルクに影響されることなく円滑に押圧部材を回
転させながら進退させるためには、変速用の駆動手段と
なるモーターについてそれに対応できる性能のものを選
定することが必要となって、モーターのコストアップを
招くことともなる。Further, a pressing member which advances and retreats while rotating,
Even when the bearing is brought into contact with the movable conical wheel with the bearing interposed therebetween, the bearing has a relatively large diameter, and the rotational force of the movable conical wheel transmitted to the pressing member via such a large-diameter bearing. Is
Since the torque is transmitted to the pressing member as a large torque, in order to smoothly advance and retreat while rotating the pressing member without being affected by such torque, the performance of the motor as the driving means for shifting can correspond to it. It is necessary to select a motor which increases the cost of the motor.

【００１０】そのような問題を解消するためには、上記
の請求項１に記載した本発明において、上記の請求項２
に記載したように、略筒状に形成されて外周側にネジが
刻設された送りネジ軸を、その内周側の軸受を介して回
転軸に同軸で相対回転自在に軸支し、押圧部材を、その
回転を阻止した状態で送りネジ軸の外周側のネジに螺合
させて、モーターを駆動手段として送りネジ軸を回転さ
せることで、押圧部材が回転軸の軸心方向で進退するよ
うに構成する。In order to solve such a problem, in order to solve the above-mentioned problem, in the present invention described in the above-mentioned claim 1, the above-mentioned claim 2 is required.
As described in the above, the feed screw shaft, which is formed in a substantially cylindrical shape and has a screw engraved on the outer peripheral side, is rotatably supported coaxially with the rotary shaft via a bearing on the inner peripheral side so as to be relatively rotatable, and is pressed. The pressing member moves in the axial direction of the rotation shaft by screwing the member to the screw on the outer peripheral side of the feed screw shaft in a state where the rotation is prevented, and rotating the feed screw shaft using the motor as a driving means. The configuration is as follows.

【００１１】そのような構成によれば、送りネジ軸を回
転させて、押圧部材を、その回転を阻止した状態で、送
りネジ軸上で進退させていることから、回転しない送り
ネジ軸上で押圧部材を回転させながら進退させるような
場合と比べて、モーターからの回転力を送りネジ軸に伝
達するための部材（例えば、送りネジ軸側の噛合歯と噛
合するモーター側の歯車）を、その回転軸線方向で長く
するようなことなく、簡単な構造のものとすることがで
きる。According to such a configuration, the feed screw shaft is rotated, and the pressing member is moved forward and backward on the feed screw shaft in a state where the rotation is prevented. A member for transmitting the rotational force from the motor to the feed screw shaft (for example, a gear on the motor side meshing with the meshing tooth on the feed screw shaft side), compared to a case in which the pressing member is moved forward and backward while rotating the pressing member, A simple structure can be obtained without lengthening in the rotation axis direction.

【００１２】また、押圧部材の回転が阻止されているこ
とで、可動円錐車の回転トルクが送りネジ軸に伝達され
ることがなく、また、押圧部材を支持する送りネジ軸と
回転軸の間に介装される軸受は比較的小径なものであ
り、送りネジ軸に伝達される回転軸の回転トルクは小さ
なものであるため、変速用の駆動手段となるモーターへ
の可動円錐車や回転軸の回転の連れ回りトルクによる影
響を小さなものとすることができる。Further, since the rotation of the pressing member is prevented, the rotational torque of the movable conical wheel is not transmitted to the feed screw shaft, and the rotation between the feed screw shaft supporting the pressing member and the rotary shaft is prevented. Since the bearings interposed in the shaft are relatively small in diameter and the rotating torque of the rotating shaft transmitted to the feed screw shaft is small, the movable conical wheel and the rotating shaft to the motor serving as the driving means for shifting are provided. The effect of the co-rotating torque of the rotation of the motor can be reduced.

【００１３】[0013]

【発明の実施の形態】以下、本発明のＶベルト式無段変
速機の変速駆動機構の実施形態について図面に基づいて
説明する。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a V-belt type continuously variable transmission according to an embodiment of the present invention.

【００１４】図１は、本発明のＶベルト式無段変速機の
変速駆動機構の一実施形態を示すもので、Ｖベルト式無
段変速機１は、除雪機の走行変速装置として使用される
ものであって、エンジン出力軸の側に連係する駆動側の
回転軸２に対して設けられた駆動プーリー３と、車軸の
側に連係する従動側の回転軸（図示せず）に対して設け
られた従動プーリー４と、両方のプーリー３，４に渡っ
て巻き回された無端のＶベルト５とを有するものであ
る。FIG. 1 shows an embodiment of a speed change drive mechanism of a V-belt type continuously variable transmission according to the present invention. A V-belt type continuously variable transmission 1 is used as a traveling transmission of a snow blower. A drive pulley 3 provided for a drive-side rotary shaft 2 linked to an engine output shaft, and a driven pulley 3 provided for a driven-side rotary shaft (not shown) linked to an axle side. And an endless V-belt 5 wound around both pulleys 3 and 4.

【００１５】駆動プーリー３と従動プーリー４のそれぞ
れについては、何れも、回転軸に固着される固定円錐車
３Ａ，４Ａと、回転軸に摺動且つ回動可能に挿着される
可動円錐車３Ｂ，４Ｂとからなるものであり、両方のプ
ーリー３，４のそれぞれにおいて、固定円錐車３Ａ，４
Ａと可動円錐車３Ｂ，４Ｂの各円錐状テーパー面によ
り、断面形状が台形の無端Ｖベルト５が挟持されてい
る。Each of the driving pulley 3 and the driven pulley 4 has a fixed conical wheel 3A, 4A fixed to the rotating shaft and a movable conical wheel 3B slidably and rotatably inserted on the rotating shaft. , 4B and fixed pulleys 3A, 4 in both pulleys 3, 4 respectively.
The endless V-belt 5 having a trapezoidal cross section is sandwiched between A and the conical tapered surfaces of the movable conical wheels 3B and 4B.

【００１６】なお、本実施形態では、駆動プーリー３
は、固定円錐車３Ａが回転軸２の外端部に配置され、そ
の内側（回転軸２を支持するハウジング７に近い側）に
可動円錐車３Ｂが配置されているのに対して、従動プー
リー４は、可動円錐車４Ｂが回転軸の外端部に配置さ
れ、その内側に固定円錐車４Ａが配置されている。In this embodiment, the driving pulley 3
The driven pulley 3A is arranged at the outer end of the rotating shaft 2 and the movable cone wheel 3B is disposed inside (closer to the housing 7 supporting the rotating shaft 2). Reference numeral 4 denotes a movable conical wheel 4B disposed at the outer end of the rotating shaft, and a fixed conical wheel 4A disposed inside thereof.

【００１７】そのようなＶベルト式無段変速機１では、
駆動プーリー３の側で、可動円錐車３Ｂをその回転軸２
の軸線方向に沿って任意に進退させることにより、固定
円錐車３Ａと可動円錐車３Ｂの間隔を任意に変化させ
て、駆動プーリー３におけるベルト径を任意に変化さ
せ、それに応じて、無端Ｖベルト５を介して連動する従
動プーリー４の側で、可動円錐車４Ｂが自動的に進退し
て従動プーリー４におけるベルト径が自動的に変化する
ことで、駆動プーリー３と従動プーリー４のベルト径の
比が変化して、駆動側の回転軸２から従動側の回転軸
（図示せず）への動力伝達が無段階で変速されることと
なる。In such a V-belt type continuously variable transmission 1,
On the side of the drive pulley 3, the movable conical wheel 3B is
, The distance between the fixed conical wheel 3A and the movable conical wheel 3B is arbitrarily changed, the belt diameter of the drive pulley 3 is arbitrarily changed, and the endless V-belt is accordingly changed. On the side of the driven pulley 4 interlocked with the driven pulley 5, the movable conical wheel 4B automatically advances and retreats, and the belt diameter of the driven pulley 4 automatically changes, so that the belt diameter of the driving pulley 3 and the driven pulley 4 is reduced. The ratio changes, and the power transmission from the drive-side rotating shaft 2 to the driven-side rotating shaft (not shown) is continuously variable.

【００１８】そのようなＶベルト式無段変速機１におけ
る変速駆動機構、即ち、駆動プーリー３の可動円錐車３
Ｂをその回転軸２の軸線方向に沿って任意に進退させる
ための機構について説明すると、既に述べたように、Ｖ
ベルト式無段変速機１の駆動側の回転軸２には、駆動プ
ーリー３として、回転軸２の外端部に固定円錐車３Ａが
一体的に固着されていると共に、その内側で固定円錐車
３Ａと間隔を置いて、可動円錐車３Ｂが回転軸２に摺動
且つ回動可能に挿着されている。The speed change drive mechanism of such a V-belt type continuously variable transmission 1, that is, the movable conical wheel 3 of the drive pulley 3
A mechanism for arbitrarily moving B back and forth along the axial direction of the rotary shaft 2 will be described.
A fixed conical wheel 3A is integrally fixed to the outer end of the rotary shaft 2 as a drive pulley 3 on the rotary shaft 2 on the drive side of the belt-type continuously variable transmission 1 and has a fixed conical wheel inside thereof. A movable conical wheel 3B is slidably and rotatably mounted on the rotating shaft 2 at an interval from 3A.

【００１９】そのようなＶベルト式無段変速機１の駆動
側の回転軸２には、該回転軸２の可動円錐車３Ｂよりも
内側（可動円錐車３Ｂとハウジング７の間）で、ハウジ
ング７に近接して、略筒状に形成されて外周側にネジが
刻設された送りネジ軸８が、その内周側の軸受９を介し
て回転軸２に同軸で回転可能に軸支されており、この送
りネジ軸８の外周側には、変速用の駆動手段となる電動
モーター（図示せず）の回転力を送りネジ軸８に伝達す
るための歯車１０が一体的に固着され、また、可動円錐
車３Ｂをその回転軸線方向で押圧するための押圧部材１
１が、ピン１２により回転が阻止された状態で、送りネ
ジ軸８のネジに螺合されている。The rotary shaft 2 on the drive side of the V-belt type continuously variable transmission 1 is provided inside the movable conical wheel 3B of the rotary shaft 2 (between the movable conical wheel 3B and the housing 7). A feed screw shaft 8, which is formed in a substantially cylindrical shape and has an engraved screw on the outer peripheral side, is rotatably supported coaxially with the rotary shaft 2 via a bearing 9 on the inner peripheral side thereof in the vicinity of 7. A gear 10 for transmitting the rotational force of an electric motor (not shown) serving as a driving means for shifting to the feed screw shaft 8 is integrally fixed to the outer peripheral side of the feed screw shaft 8, Further, a pressing member 1 for pressing the movable conical wheel 3B in the direction of its rotation axis.
1 is screwed into the screw of the feed screw shaft 8 in a state where the rotation is prevented by the pin 12.

【００２０】ピン１２により押圧部材１１の回転を阻止
するための構造については、ハウジング７の突出部分に
穿設された溝部（長孔）１３にピン１２が挿入されてい
ることで、回転軸２の軸線方向と平行に延びる溝部１３
の長手方向に沿ってピン１２の移動が可能とされてお
り、ピン１２を一体的に固着した押圧部材１１は、ピン
１２により回転が阻止された状態で、溝部１３の長さの
範囲内だけ回転軸２の軸線方向に進退可能とされてい
る。Regarding the structure for preventing the rotation of the pressing member 11 by the pin 12, the pin 12 is inserted into a groove (a long hole) 13 formed in a protruding portion of the housing 7, so that the rotation shaft 2 is rotated. Groove 13 extending parallel to the axial direction of
The pin 12 can be moved along the longitudinal direction of the pin 12, and the pressing member 11 to which the pin 12 is integrally fixed is moved only within the length of the groove 13 in a state where the rotation is prevented by the pin 12. The rotary shaft 2 can move forward and backward in the axial direction.

【００２１】なお、本実施形態では、図２（図１に矢印
Ｙで示した方向から見た部分）に示すように、ピン１２
に対して、変位検出手段となるポテンショメーター１５
の検出部１５ａが係合されており、ピン１２が溝部１３
内を移動するのに連れて検出部１５ａが回動されること
で、その回動角度によって押圧部材１１の進退の程度を
ポテンショメーター１５により検出するように構成され
ていて、その結果、駆動プーリー３における固定円錐車
３Ａと可動円錐車３Ｂの間隔を検出できるようになって
いる。In this embodiment, as shown in FIG. 2 (portion viewed from the direction indicated by arrow Y in FIG. 1),
, A potentiometer 15 as a displacement detecting means
Are engaged, and the pin 12 is
When the detection unit 15a is rotated as it moves through the inside, the degree of advance and retreat of the pressing member 11 is detected by the potentiometer 15 based on the rotation angle, and as a result, the drive pulley 3 The distance between the fixed cone wheel 3A and the movable cone wheel 3B can be detected.

【００２２】送りネジ軸８に螺合された押圧部材１１と
連係するように、可動円錐車３Ｂの側には、押圧連係部
材１６がボルト１７により可動円錐車３Ｂに一体的に固
着されており、押圧連係部材１６は、軸受１８を介し
て、押圧部材１１と相対的に回転可能なように連結され
ていて、ピン１２により回転が阻止された押圧部材１１
が、送りネジ軸８の回転により回転軸２の軸心方向で進
退するのに連れ、軸受１８と押圧連係部材１６を介し
て、可動円錐車３Ｂが押圧又は押圧解除されるようにな
っている。On the side of the movable conical wheel 3B, a pressure linking member 16 is integrally fixed to the movable conical wheel 3B by bolts 17 so as to be linked with the pressing member 11 screwed to the feed screw shaft 8. The pressing link member 16 is rotatably connected to the pressing member 11 via a bearing 18, and the rotation of the pressing member 11 is prevented by the pin 12.
However, as the feed screw shaft 8 rotates and advances in the axial direction of the rotary shaft 2, the movable conical wheel 3 </ b> B is pressed or released via the bearing 18 and the pressing linking member 16. .

【００２３】さらに、駆動側の回転軸２には、送りネジ
軸８と可動円錐車３Ｂの間に、回転軸固着部材１９がボ
ルト２０により回転軸２に一体的に固着されており、回
転軸固着部材１９と可動円錐車３Ｂの間には、圧縮バネ
となるコイルスプリング２１が介装されている。Further, a rotary shaft fixing member 19 is integrally fixed to the rotary shaft 2 by bolts 20 between the feed screw shaft 8 and the movable conical wheel 3B on the rotary shaft 2 on the driving side. A coil spring 21 serving as a compression spring is interposed between the fixed member 19 and the movable conical wheel 3B.

【００２４】可動円錐車３Ｂには、その側面（円錐状の
テーパー面とは反対側の面）に、回転軸２の回転方向に
対して傾斜した傾斜部２２が一体的に形成されており、
この可動円錐車３Ｂの傾斜部２２に対応して、可動円錐
車３Ｂをその回転方向に押圧するための押圧子となるロ
ーラー２３が、傾斜部２２に当接するように回転軸固着
部材１９に軸支されている。The movable conical wheel 3B is integrally formed with an inclined portion 22 inclined on the side surface (the surface opposite to the conical tapered surface) with respect to the rotation direction of the rotating shaft 2.
Corresponding to the inclined portion 22 of the movable conical wheel 3B, a roller 23 serving as a pressing member for pressing the movable conical wheel 3B in the rotation direction is pivoted on the rotating shaft fixing member 19 so as to contact the inclined portion 22. Supported.

【００２５】なお、本実施形態では、駆動プーリー３お
よび従動プーリー４のそれぞれの固定円錐車３Ａ，４Ａ
および可動円錐車３Ｂ，４Ｂは、何れも同じ製造部品と
して同一形状に形成されており、何れの部材としても汎
用できるものとなっていて、可動円錐車３Ｂの傾斜部２
２と回転軸固着部材１９のローラー２３は、従動プーリ
ー４の可動円錐車４Ｂによって図示されているのと同様
に、それぞれ複数個（各３個ずつ）設けられ、各ローラ
ー２３が各傾斜部２２にそれぞれ当接されている。In this embodiment, the fixed pulleys 3A and 4A of the driving pulley 3 and the driven pulley 4 are respectively provided.
The movable conical wheels 3B and 4B are formed in the same shape as the same manufactured parts, and can be used as any of the members.
2 and the rollers 23 of the rotating shaft fixing member 19 are each provided in a plurality (three each) in the same manner as shown by the movable conical wheel 4B of the driven pulley 4, and each roller 23 is Are in contact with each other.

【００２６】上記のように構成されているＶベルト式無
段変速機１の変速駆動機構の作動状態について説明する
と、エンジン（図示せず）が駆動されて、駆動側の回転
軸２の回転が、駆動プーリー３と無端Ｖベルト５と従動
プーリー４を介し、従動側の回転軸（図示せず）への動
力伝達されている状態で、動力伝達を変速するために、
変速用の駆動手段である電動モーター（図示せず）を所
望の回転数だけ回転又は逆回転させるように制御するこ
とによって、歯車１０を介して送りネジ軸８が回転又は
逆回転される。The operation of the speed change drive mechanism of the V-belt type continuously variable transmission 1 constructed as described above will be described. An engine (not shown) is driven, and the rotation of the drive-side rotary shaft 2 is controlled. In order to change the power transmission in a state where the power is transmitted to the driven rotation shaft (not shown) via the driving pulley 3, the endless V-belt 5, and the driven pulley 4,
By controlling an electric motor (not shown), which is a drive means for shifting, to rotate or reverse the desired number of rotations, the feed screw shaft 8 is rotated or reversely rotated via the gear 10.

【００２７】それにより、送りネジ軸８に螺合されてい
る押圧部材１１は、ピン１２により回転が阻止された状
態で、送りネジ軸８上を回転軸２の軸線方向に進退させ
られ、この押圧部材１１の進退により、軸受１８と押圧
連係部材１６を介して、可動円錐車３Ｂが押圧又は押圧
解除されることで、可動円錐車３Ｂと固定円錐車３Ａの
間隔が任意に変化させられる。As a result, the pressing member 11 screwed to the feed screw shaft 8 is advanced and retracted on the feed screw shaft 8 in the axial direction of the rotary shaft 2 while the rotation thereof is prevented by the pin 12. By moving the pressing member 11 forward and backward, the movable conical wheel 3B is pressed or released via the bearing 18 and the pressing linking member 16, whereby the distance between the movable conical wheel 3B and the fixed conical wheel 3A is arbitrarily changed.

【００２８】なお、送りネジ軸８の回転方向について
は、押圧部材１１により可動円錐車３Ｂを押圧するとき
に、回転軸２の回転方向と同一方向となるようにするの
が良く、そうすることで、軸受９を介して送りネジ軸８
に伝達される回転軸２のトルクが連れ回りトルクとして
作用し、その分だけ押圧部材１１により可動円錐車３Ｂ
を押圧するときの回転駆動力（送りネジ軸８を回転させ
る回転駆動力）が少なくて済む。The rotation direction of the feed screw shaft 8 should preferably be the same as the rotation direction of the rotation shaft 2 when the movable conical wheel 3B is pressed by the pressing member 11, And the feed screw shaft 8 via the bearing 9
Of the rotating shaft 2 transmitted to the movable cone wheel 3B by the pressing member 11
The rotational driving force (the rotational driving force for rotating the feed screw shaft 8) when pressing is reduced.

【００２９】上記のような変速駆動機構の作動状態にお
いて、回転軸２に対して摺動且つ回動可能に挿着されて
いる可動円錐車３Ｂは、回転軸固着部材１９のローラー
２３により可動円錐車３Ｂの傾斜部２２を回転方向に押
圧する押圧力を主たる連結力とし、回転軸固着部材１９
との間に介装されたコイルスプリング２１のバネ力を補
助的な連結力として、回転軸２の回転に連動すること
で、固定円錐車３Ａと同様に回転することとなる。In the operating state of the speed change drive mechanism as described above, the movable conical wheel 3 B slidably and rotatably inserted with respect to the rotary shaft 2 is moved by the rollers 23 of the rotary shaft fixing member 19. The pressing force for pressing the inclined portion 22 of the wheel 3B in the rotation direction is used as the main connecting force, and the rotation shaft fixing member 19 is used.
By interlocking with the rotation of the rotating shaft 2 using the spring force of the coil spring 21 interposed therebetween as an auxiliary connecting force, it rotates like the fixed conical wheel 3A.

【００３０】そのように回転軸２に連動して回転してい
る可動円錐車３Ｂに対して、押圧部材１１は、ピン１２
により回転が阻止された状態で、軸受１８と押圧連係部
材１６を介して、押圧又は押圧解除が可能なように連結
されており、この押圧部材１１を支持する送りネジ軸８
は、軸受９を介して、回転軸２に相対回転自在な状態で
支持されている。With respect to the movable conical wheel 3B rotating in conjunction with the rotating shaft 2, the pressing member 11
In a state where the rotation is prevented by this, the bearing is connected to the bearing 18 via the pressing linking member 16 so as to be able to press or release, and the feed screw shaft 8 supporting the pressing member 11 is provided.
Are supported by the rotating shaft 2 via a bearing 9 so as to be relatively rotatable.

【００３１】また、Ｖベルト５の駆動による可動円錐車
３Ｂからの反作用力に対して、回転軸固着部材１９のロ
ーラー２３が可動円錐車３Ｂの傾斜部２２を押圧するこ
とにより発生する回転軸線方向の分力（ローラー２３の
押圧力は、傾斜部２２により回転方向への押圧力と軸線
方向への押圧力とに分力される）が、可動円錐車３Ｂか
らの反作用力に対抗する主たる力として働いていると共
に、コイルスプリング２１のバネ力（可動円錐車３Ｂを
Ｖベルト５に摩擦係合させるためのバネ力）が、可動円
錐車３Ｂからの反作用力に対抗する補助的な力として働
いている。Further, in response to the reaction force from the movable conical wheel 3B due to the driving of the V-belt 5, the roller 23 of the rotating shaft fixing member 19 presses the inclined portion 22 of the movable conical wheel 3B in the direction of the rotational axis. (The pressing force of the roller 23 is divided into the pressing force in the rotational direction and the pressing force in the axial direction by the inclined portion 22), and the main force opposing the reaction force from the movable conical wheel 3B. And the spring force of the coil spring 21 (the spring force for frictionally engaging the movable conical wheel 3B with the V-belt 5) acts as an auxiliary force against the reaction force from the movable conical wheel 3B. ing.

【００３２】上記のように作動する本実施形態のＶベル
ト式無段変速機の変速駆動機構によれば、回転軸２の回
転により回転軸固着部材１９のローラー（押圧子）２３
が可動円錐車３Ｂの傾斜部２２を押圧することで発生す
る回転軸線方向の分力や、回転軸固着部材１９と可動円
錐車３Ｂの間に介装されたコイルスプリング２１のバネ
力が、Ｖベルト５の駆動による可動円錐車３Ｂからの反
作用力に対抗するように働くことから、押圧連係部材１
６と軸受１８を介して押圧部材１１に作用する可動円錐
車３Ｂからの反作用力が大幅に軽減されることとなり、
その結果、可動円錐車３Ｂを押圧するために押圧部材１
１を駆動させるときの駆動力を小さくすることができ
て、駆動手段を小型化することができる。According to the speed change drive mechanism of the V-belt type continuously variable transmission of the present embodiment that operates as described above, the rotation of the rotating shaft 2 causes the roller (pressing element) 23 of the rotating shaft fixing member 19 to rotate.
Presses the inclined portion 22 of the movable conical wheel 3B, the component force in the direction of the rotational axis, and the spring force of the coil spring 21 interposed between the rotational shaft fixing member 19 and the movable conical wheel 3B are V Since the belt 5 acts to oppose the reaction force from the movable conical wheel 3B, the pressing linking member 1
The reaction force from the movable conical wheel 3B acting on the pressing member 11 via the bearing 6 and the bearing 18 is greatly reduced,
As a result, the pressing member 1 presses the movable cone wheel 3B.
1 can be reduced in driving force, and the driving means can be reduced in size.

【００３３】なお、本実施形態では、進退しない送りネ
ジ軸８にモーターの回転力を伝達させて、回転を阻止さ
れた状態の押圧部材１１を送りネジ軸８の回転により進
退させていることにより、例えば、進退する押圧部材に
モーターの回転力を伝達させることで、回転が阻止され
た送りネジ軸上で押圧部材を回転させながら進退させる
ような場合と比べて、モーターの回転力を伝達させるた
めに幅（回転軸線の長さ）の大きな歯車のような部材を
用いるようなことなく、モーターから押圧部材１１まで
の伝達経路の構造を簡単なものとすることができ、コス
トの低減を図ることができる。In the present embodiment, the rotational force of the motor is transmitted to the feed screw shaft 8 which does not advance and retreat, and the pressing member 11 in a state where the rotation is prevented is advanced and retracted by the rotation of the feed screw shaft 8. For example, by transmitting the rotational force of the motor to the pressing member that moves forward and backward, the rotational force of the motor is transmitted as compared with the case where the pressing member rotates and moves forward and backward on the feed screw shaft where rotation is prevented. Therefore, the structure of the transmission path from the motor to the pressing member 11 can be simplified without using a member such as a gear having a large width (length of the rotation axis), thereby reducing the cost. be able to.

【００３４】また、押圧部材１１の回転が阻止されてい
ることで、可動円錐車３Ｂの回転トルクが送りネジ軸８
に伝達されることがなく、しかも、略筒状に形成された
送りネジ軸８を、その内周側の軸受９を介して回転軸２
に同軸に軸支させていることで、該軸受９を小径とする
ことができて、送りネジ軸８に伝達される回転軸２の回
転トルクを小さなものとすることができるため、変速用
の駆動手段となるモーターへの可動円錐車３Ｂや回転軸
２の回転の連れ回りトルクによる影響を小さなものとす
ることができる。Further, since the rotation of the pressing member 11 is prevented, the rotational torque of the movable conical wheel 3 B is reduced by the feed screw shaft 8.
The feed screw shaft 8, which is not transmitted to the rotary shaft 2, and is formed in a substantially cylindrical shape, is connected to the rotary shaft 2 via a bearing 9 on the inner peripheral side thereof.
The shaft 9 is coaxially supported, so that the diameter of the bearing 9 can be reduced, and the rotational torque of the rotating shaft 2 transmitted to the feed screw shaft 8 can be reduced. The influence of the rotation torque of the rotation of the movable conical wheel 3B and the rotating shaft 2 on the motor serving as the driving means can be reduced.

【００３５】また、本実施形態では、回転が阻止された
状態の押圧部材１１について、回転軸２の軸線方向での
押圧部材１１の進退をポテンショメーター１５により検
出していることで、変位を精度良く検出することがで
き、且つ、変位検出手段の検出部分における摩耗や潤滑
の問題が起きることもない。Further, in the present embodiment, the displacement of the pressing member 11 in a state where the rotation is prevented is detected by the potentiometer 15 by detecting the advance and retreat of the pressing member 11 in the axial direction of the rotating shaft 2 so that the displacement can be accurately detected. It can be detected, and there is no problem of wear and lubrication in the detection portion of the displacement detection means.

【００３６】すなわち、回転体の回転軸線方向の変位を
測定する場合には、回転体の回転精度が悪いと、回転に
よる振れを変位と誤って検出する恐れがあり、また、変
位検出手段の検出部分を回転体に接触させて変位を検出
することで、該検出部と回転体の間の潤滑が必要となっ
たり、該検出部と回転体の間の摩擦により検出部分が摩
耗するというような問題が発生することとなる。That is, when the displacement of the rotating body in the direction of the rotation axis is measured, if the rotating precision of the rotating body is poor, there is a possibility that the vibration due to the rotation may be erroneously detected as the displacement. By detecting the displacement by bringing the portion into contact with the rotating body, lubrication between the detecting section and the rotating body is required, or the detecting section is worn due to friction between the detecting section and the rotating body. Problems will arise.

【００３７】さらに、本実施形態では、押圧部材１１の
回転を阻止するためのピン１２に対して、変位検出手段
となるポテンショメーター１５の検出部１５ａを係合さ
せていることで、ピン１２を押圧部材１１の回転阻止と
変位検出の２つの用途に兼用させることができ、それに
より、駆動プーリー３における可動円錐車３Ｂの変位検
出手段と、押圧部材１１の回転阻止構造とについて、簡
略化・コンパクト化を図ることができて、製品コストを
削減することができる。Further, in the present embodiment, the pin 12 for preventing the rotation of the pressing member 11 is engaged with the detecting portion 15a of the potentiometer 15 serving as the displacement detecting means. It can be used for the two purposes of preventing rotation of the member 11 and detecting the displacement, whereby the means for detecting the displacement of the movable conical wheel 3B in the drive pulley 3 and the structure for preventing the rotation of the pressing member 11 are simplified and compact. And product cost can be reduced.

【００３８】以上、本発明のＶベルト式無段変速機の変
速駆動機構の一実施形態について説明したが、本発明
は、上記のような実施形態に限られるものではなく、例
えば、その具体的な構造については、従動プーリーに対
して変速駆動機構を設けることも可能であり、駆動手段
として電動モーター以外に手動やその他の手段を適用す
ることも可能であり、押圧部材についても、回転軸に同
軸で相対回転自在に設けた筒状体の外周側にスプライン
係合させてリンク機構等により手動で進退させるように
したりすることも可能であり、また、押圧子となるロー
ラーを可動円錐車の側に設け、それに当接する傾斜部を
回転軸の側に設けることにより実施することも可能であ
る等、適宜設計変更可能なものであって、その用途につ
いても、除雪機の走行変速装置に限らず、例えば、農業
作業機や土木・建築作業機等に好適である等、適宜の車
両や機械装置の変速装置に対して適用可能なものである
ことは言うまでもない。The embodiment of the speed change drive mechanism of the V-belt type continuously variable transmission according to the present invention has been described above. However, the present invention is not limited to the above-described embodiment. For a simple structure, it is also possible to provide a variable speed drive mechanism for the driven pulley, and it is also possible to apply manual or other means other than the electric motor as the drive means, and also to apply a pressing member to the rotating shaft. It is also possible to engage a spline on the outer peripheral side of a cylindrical body provided coaxially and relatively rotatable so as to advance and retreat manually by a link mechanism or the like. The design can be changed as appropriate, for example, it can be implemented by providing an inclined portion on the side of the rotating shaft that is provided on the side of the rotary shaft. Is not limited to the transmission, for example, like a suitable agricultural working machine and civil engineering and construction work machine, it goes without saying as it can be applied to the transmission of appropriate vehicles and machinery.

【００３９】[0039]

【発明の効果】以上説明したような本発明のＶベルト式
無段変速機の変速駆動機構によれば、可動円錐車からの
反作用力を、傾斜部と押圧子およびスプリングを介し
て、該可動円錐車の回転軸にも支持させることで、押圧
部材にかかる可動円錐車からの反作用力を軽減させるこ
とができ、その結果、小さな駆動力により押圧部材を介
して可動円錐車を押圧することができて、変速のための
駆動手段を小型化することができる。According to the speed change drive mechanism of the V-belt type continuously variable transmission according to the present invention as described above, the reaction force from the movable conical wheel is transmitted to the movable member via the inclined portion, the pressing member and the spring. By also supporting the rotating shaft of the conical wheel, the reaction force from the movable conical wheel on the pressing member can be reduced, and as a result, the movable conical wheel can be pressed via the pressing member with a small driving force. As a result, the drive means for shifting can be downsized.

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

【図１】本発明のＶベルト式無段変速機の変速駆動機構
の一実施形態を示す部分断面上面図。FIG. 1 is a partial cross-sectional top view showing an embodiment of a shift drive mechanism of a V-belt type continuously variable transmission according to the present invention.

【図２】図１に示したＶベルト式無段変速機における押
圧部材の変位検出手段の部分について、図１の矢印Ｙ方
向から見た側面図。FIG. 2 is a side view of a part of a displacement detecting means of a pressing member in the V-belt type continuously variable transmission shown in FIG. 1, as viewed from the direction of arrow Y in FIG.

【符号の説明】[Explanation of symbols]

１ Ｖベルト式無段変速機 ２ （駆動側の）回転軸 ３ 駆動プーリー ３Ａ （駆動プーリーの）固定円錐車 ３Ｂ （駆動プーリーの）可動円錐車 ４ 従動プーリー ４Ａ （従動プーリーの）固定円錐車 ４Ｂ （従動プーリーの）可動円錐車 ５ 無端Ｖベルト ８ 送りネジ軸 ９ （送りネジ軸の）軸受 １１ 押圧部材 １５ ポテンショメーター（変位検出手段） ２１ コイルスプリング（スプリング） ２２ 傾斜部 ２３ ローラー（押圧子） Reference Signs List 1 V-belt type continuously variable transmission 2 Rotating shaft (on the drive side) 3 Drive pulley 3A Fixed cone wheel (of drive pulley) 3B Movable cone wheel (of drive pulley) 4 Follower pulley 4A Fixed cone wheel (of driven pulley) 4B Movable conical wheel (of driven pulley) 5 Endless V-belt 8 Feed screw shaft 9 Bearing (of feed screw shaft) 11 Pressing member 15 Potentiometer (displacement detecting means) 21 Coil spring (spring) 22 Inclined portion 23 Roller (pressing element)

Claims (3)

【特許請求の範囲】[Claims] 【請求項１】 無端Ｖベルトを巻き回した駆動プーリー
と従動プーリーのそれぞれが、回転軸に固着される固定
円錐車と、回転軸に摺動且つ回動可能に挿着される可動
円錐車とからなり、駆動プーリーと従動プーリーの何れ
か一方で、駆動手段により回転軸の軸線方向に進退され
る押圧部材が、可動円錐車およびその回転軸に対してそ
れぞれ相対回転可能で、且つ、可動円錐車を押圧又は押
圧解除するように、可動円錐車の側方に配置されている
Ｖベルト式無段変速機において、押圧部材により押圧さ
れる可動円錐車とその回転軸に対して、その何れか一方
の側に回転軸の回転方向に対して傾斜した傾斜部が設け
られ、他方の側に該傾斜部に当接する押圧子が設けられ
ていると共に、該可動円錐車とその回転軸との間に、可
動円錐車を固定円錐車の側に押し付けるためのスプリン
グが配設されていることを特徴とするＶベルト式無段変
速機の変速駆動機構。1. A fixed conical wheel in which a drive pulley and a driven pulley around which an endless V-belt is wound are fixed to a rotating shaft, and a movable conical wheel slidably and rotatably inserted in the rotating shaft. And a pressing member which is advanced or retracted in the axial direction of the rotating shaft by the driving means, and which is relatively rotatable with respect to the movable conical wheel and the rotating shaft thereof, and is provided with a movable cone. In a V-belt type continuously variable transmission which is disposed on the side of a movable conical wheel so as to press or release the vehicle, any one of a movable conical wheel pressed by a pressing member and a rotating shaft thereof is pressed. On one side, an inclined portion inclined with respect to the rotation direction of the rotating shaft is provided, and on the other side, a pressing element that contacts the inclined portion is provided, and between the movable conical wheel and the rotating shaft. To a fixed cone with a movable cone wheel A speed change drive mechanism for a V-belt type continuously variable transmission, wherein a spring for pressing against a vehicle is provided. 【請求項２】 略筒状に形成されて外周側にネジが刻設
された送りネジ軸が、その内周側の軸受を介して回転軸
に同軸で相対回転自在に軸支され、押圧部材が、その回
転が阻止された状態で送りネジ軸の外周側のネジに螺合
されていて、モーターを駆動手段として送りネジ軸を回
転させることで、押圧部材が回転軸の軸心方向で進退す
るように構成されていることを特徴とする請求項１に記
載のＶベルト式無段変速機の変速駆動機構。2. A feed screw shaft, which is formed in a substantially cylindrical shape and has a screw engraved on an outer peripheral side, is coaxially supported by a rotary shaft via a bearing on an inner peripheral side thereof so as to be relatively rotatable. However, the rotation of the feed screw shaft is screwed to the screw on the outer peripheral side of the feed screw shaft in a state where the rotation is prevented, and the pressing member advances and retreats in the axial direction of the rotary shaft by rotating the feed screw shaft using the motor as a driving means. The speed change drive mechanism of a V-belt type continuously variable transmission according to claim 1, wherein the speed change drive mechanism is configured to perform the following. 【請求項３】 回転が阻止された状態で回転軸の軸心方
向に進退させられる押圧部材について、その進退を変位
検出手段により検出するようにしたことを特徴とする請
求項１又は２に記載のＶベルト式無段変速機の変速駆動
機構。3. The pressing member which is moved back and forth in the axial direction of the rotation shaft in a state where the rotation is stopped, wherein the movement of the pressing member is detected by a displacement detecting means. Of the V-belt type continuously variable transmission.