JP2006070949A - Toroidal continuously variable transmission - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To realize a structure capable of threading and tightening a trunnion 4 with a rod 8 even if the supporting strength of the support portions of support plates 16 and 16 and a casing is not so high. <P>SOLUTION: The threading directions of both male and female screw parts 24 and 25 of multiple sets of trunnions 4 and rods 8 supported on the same support plates 16 and 16 are reversed to each other. In assembling, both the male and female parts 24 and 25 of the multiple sets of trunnions 4 and rods 8 having threading directions reversed to each other are simultaneously threaded and tightened with each other. By this configuration, forces based on tightening forces applied to the support plates 16 and 16 can be offset each other. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

この発明は、自動車用自動変速装置として利用するトロイダル型無段変速機の改良に関する。具体的には、パワーローラを回転自在に支持したトラニオンと、変速の為のアクチュエータのロッドとの結合を後から行なえる構造で、上記トラニオンを支持する為の支持板と固定の部分との支持部分の支持強度を過剰に大きくする事なく、組立順序の自由度の向上を図ると共に、トラクション部を構成する各面の損傷防止を図るべく発明したものである。   The present invention relates to an improvement in a toroidal type continuously variable transmission used as an automatic transmission for an automobile. Specifically, the trunnion that rotatably supports the power roller and the rod of the actuator for speed change can be connected later, and the support plate and the fixed portion for supporting the trunnion are supported. The invention was invented to improve the degree of freedom in the assembly sequence without excessively increasing the support strength of the portions and to prevent damage to each surface constituting the traction portion.

自動車用自動変速装置として、図４〜６に示す様なハーフトロイダル型のトロイダル型無段変速機を使用する事が研究され、一部で実施されている。このトロイダル型無段変速機は、互いに対向する軸方向側面をトロイド曲面とした入力側ディスク１、１と出力側ディスク２、２との間に複数個のパワーローラ３、３を挟持して成る。運転時には、上記入力側ディスク１、１の回転が、これら各パワーローラ３、３を介して上記出力側ディスク２、２に伝達される。これら各パワーローラ３、３は、それぞれトラニオン４、４に回転自在に支持されており、これら各トラニオン４、４は、それぞれ上記両ディスク１、２の中心軸に対し捩れの位置にある枢軸５、５を中心とする揺動変位を自在に支持されている。上記両ディスク１、２同士の間の変速比を変える場合は、油圧式のアクチュエータ６により上記各トラニオン４、４を上記枢軸５、５の軸方向に変位させる。この様なアクチュエータ６への圧油の給排は、制御弁７により制御すると共に、上記トラニオン４の動きを上記アクチュエータ６を構成するロッド８並びにプリセスカム９、リンク腕１０を介して、上記制御弁７にフィードバックする様に構成している。   The use of a half-toroidal toroidal continuously variable transmission as shown in FIGS. 4 to 6 has been studied and partially implemented as an automatic transmission for automobiles. This toroidal-type continuously variable transmission has a plurality of power rollers 3 and 3 sandwiched between input-side disks 1 and 1 and output-side disks 2 and 2 having axially opposite side surfaces facing each other as a toroidal curved surface. . During operation, the rotation of the input side disks 1, 1 is transmitted to the output side disks 2, 2 via these power rollers 3, 3. The power rollers 3 and 3 are rotatably supported by trunnions 4 and 4, respectively. The trunnions 4 and 4 are pivots 5 that are twisted with respect to the central axes of the disks 1 and 2, respectively. Oscillating displacement about 5 is supported freely. When changing the transmission ratio between the disks 1 and 2, the trunnions 4 and 4 are displaced in the axial direction of the pivots 5 and 5 by a hydraulic actuator 6. The supply / discharge of pressure oil to / from the actuator 6 is controlled by the control valve 7, and the movement of the trunnion 4 is controlled by the control valve 7 via the rod 8, the recess cam 9 and the link arm 10 constituting the actuator 6. It is configured to feed back to 7.

上記アクチュエータ６、６への圧油の給排に基づき上記各トラニオン４、４を上記枢軸５、５の軸方向に変位させると、上記各パワーローラ３、３の周面と上記入力側、出力側各ディスク１、２の内側面との転がり接触部（トラクション部）に作用する、接線方向の力の向きが変化（転がり接触部にサイドスリップが発生）する。そして、この力の向きの変化に伴って上記各トラニオン４、４が上記枢軸５、５を中心に揺動（傾斜）し、上記各パワーローラ３、３の周面と上記入力側、出力側各ディスク１、２の内側面との接触位置が変化する。上記各パワーローラ３、３の周面を、上記入力側ディスク１、１の内側面の径方向外寄り部分と、上記出力側ディスク２、２の内側面の径方向内寄り部分とに転がり接触させれば、上記両ディスク１、２同士の間の変速比が増速側になる。これに対して、上記各パワーローラ３、３の周面を、上記入力側ディスク１、１の内側面の径方向内寄り部分と、上記出力側ディスク２、２の内側面の径方向外寄り部分とに転がり接触させれば、上記両ディスク１、２同士の間の変速比が減速側になる。   When the trunnions 4, 4 are displaced in the axial direction of the pivots 5, 5 based on supply / discharge of pressure oil to / from the actuators 6, 6, the peripheral surfaces of the power rollers 3, 3, the input side, and the output side The direction of the tangential force acting on the rolling contact portion (traction portion) with the inner surface of each of the side disks 1 and 2 changes (side slip occurs at the rolling contact portion). The trunnions 4 and 4 swing (tilt) around the pivots 5 and 5 with the change in the direction of the force, and the peripheral surfaces of the power rollers 3 and 3 and the input and output sides. The contact position with the inner surface of each disk 1 and 2 changes. Rolling contact of the peripheral surfaces of the power rollers 3 and 3 with the radially outward portion of the inner surface of the input side discs 1 and 1 and the radially inward portion of the inner surface of the output side discs 2 and 2 By doing so, the gear ratio between the two disks 1 and 2 is increased. On the other hand, the peripheral surfaces of the power rollers 3 and 3 are arranged radially inwardly on the inner side surfaces of the input side disks 1 and 1 and radially outwardly on the inner side surfaces of the output side disks 2 and 2. If it is brought into rolling contact with the portion, the gear ratio between the two disks 1 and 2 is reduced.

上述の様なトロイダル型無段変速機で、上記各アクチュエータ６、６の動きを上記各トラニオン４、４に伝達する部分の構造に就いては、特許文献１等、多くの刊行物に記載され、或は実施されて、広く知られている。図７は、従来から実施されている構造を示している。この従来構造の場合には、トラニオン４の一端部（下端部）に設けた枢軸５の中心部に形成した支持孔１１に、ロッド８の先半部（上半部）を圧入し、ピン１２により抜け止めを図っている。又、このロッド８の基半部（下半部）に、上記アクチュエータ６、６を構成するピストン１３の中心部に設けた円筒部１４をがたつきなく外嵌し、このロッド８の先端部（下端部）に螺着したナット１５により、上記円筒部１４をこのロッド８及び上記トラニオン４に対し固定している。尚、上記ロッド８の先端部には、必要に応じてプリセスカム９（図６参照）を外嵌固定する。   In the toroidal-type continuously variable transmission as described above, the structure of the portion that transmits the movement of the actuators 6 and 6 to the trunnions 4 and 4 is described in many publications such as Patent Document 1. Or implemented and widely known. FIG. 7 shows a conventional structure. In the case of this conventional structure, the tip half (upper half) of the rod 8 is press-fitted into the support hole 11 formed at the center of the pivot 5 provided at one end (lower end) of the trunnion 4, and the pin 12 To prevent it from coming off. A cylindrical portion 14 provided at the central portion of the piston 13 constituting the actuators 6 and 6 is fitted on the base half portion (lower half portion) of the rod 8 without rattling. The cylindrical portion 14 is fixed to the rod 8 and the trunnion 4 by a nut 15 screwed to the (lower end portion). A recess cam 9 (see FIG. 6) is externally fixed to the tip of the rod 8 as required.

上述の様な図７に示した構造の場合、上記各トラニオン４と各ロッド８との連結作業は、上記ピン１２の圧入作業を行なう必要上、固定の部分であるケーシング１７に支持された１対の支持板１６、１６（図４、６参照）に上記各トラニオン４を支持する以前に行なう必要がある。これに対して、トロイダル型無段変速機を搭載する車両側の構造（ボディー形状）等、このトロイダル型無段変速機自体の構造以外の理由で、各トラニオン４と各アクチュエータ６との組み合わせ作業を、これら各トラニオン４を上記支持板１６、１６に支持した後に行なう必要が生じる場合がある。この様な場合には、例えば特許文献２、３に記載された構造の様に、各アクチュエータに付属のロッドの先端部に雄ねじを、各トラニオンの端部に設けた枢軸の中心部にねじ孔を、それぞれ形成しておけば、これら各トラニオンを支持板に支持した後に、これら各トラニオンと各アクチュエータとの組み合わせ作業を行なえる。   In the case of the structure shown in FIG. 7 as described above, the connecting operation between the trunnions 4 and the rods 8 is supported by the casing 17 which is a fixed part because the press-in operation of the pins 12 is necessary. This must be done before each trunnion 4 is supported by the pair of support plates 16 and 16 (see FIGS. 4 and 6). On the other hand, the combination work of each trunnion 4 and each actuator 6 for reasons other than the structure of the toroidal type continuously variable transmission itself, such as the structure (body shape) on the vehicle side where the toroidal type continuously variable transmission is mounted. May need to be performed after each trunnion 4 is supported by the support plates 16 and 16. In such a case, for example, as in the structures described in Patent Documents 2 and 3, a male screw is provided at the tip of the rod attached to each actuator, and a screw hole is provided at the center of the pivot provided at the end of each trunnion. If each of these trunnions is formed, the trunnions can be combined with the actuators after the trunnions are supported on the support plate.

ところで、上述の様なロッドの先端部並びに枢軸の中心部にそれぞれ雄ねじとねじ孔とを設けた構造の場合、これら雄ねじとねじ孔とが緩まない様に確実に螺合、緊締する必要がある。この理由は、これら雄ねじとねじ孔との螺合部には、パワーローラ並びにトラニオンを介して所謂２Ｆｔに基づく力｛最大で７．８４ｋＮ（８００Kgf ）以上の力｝が加わり、この力に基づき上記雄ねじとねじ孔とが緩み易くなる為である。そして、これら雄ねじとねじ孔とが緩んだ場合には、上記ロッドとトラニオンとが相対回転する（同期して揺動しなくなる）と共に、このトラニオンとアクチュエータとが軸方向に相対変位して（同期して軸方向に変位しなくなり）、変速動作が不安定になる可能性がある。前述の図７に示した様な、ロッド８の先端部でシリンダボディー３１（図４、６参照）から突出した部分にナット１５を締め付ける構造の場合には、このロッド８を回転不能に支持した状態でこのナット１５を螺合、緊締する事ができる為、これらナット１５とロッド８とを緩みにくく締め付けられる。   By the way, in the case of a structure in which a male screw and a screw hole are provided at the tip of the rod and the central part of the pivot as described above, it is necessary to securely screw and tighten the male screw and the screw hole so as not to loosen. . The reason is that a force based on so-called 2 Ft {a force of 7.84 kN (800 kgf) or more at maximum) is applied to the screwed portion between the male screw and the screw hole through the power roller and the trunnion. This is because the male screw and the screw hole are easily loosened. When the male screw and the screw hole are loosened, the rod and the trunnion rotate relative to each other (synchronize with each other) and the trunnion and the actuator are relatively displaced in the axial direction (synchronized). Thus, the shifting operation may become unstable. In the case of a structure in which the nut 15 is fastened to the protruding portion of the rod 8 from the cylinder body 31 (see FIGS. 4 and 6) as shown in FIG. 7, the rod 8 is supported so as not to rotate. Since the nut 15 can be screwed and tightened in a state, the nut 15 and the rod 8 can be tightened so as not to loosen.

これに対して、上述の様なロッドの先端部並びに枢軸の中心部にそれぞれ雄ねじとねじ孔とを設けた構造の場合、これら雄ねじとねじ孔とを緩みにくく締め付ける為には、上記トラニオンを回転不能に支持した状態で、このトラニオンと上記ロッドとを螺合、緊締する必要がある。この様にトラニオンを回転不能に支持した状態で螺合、緊締を行なう為には、このトラニオンを支持する支持板に設けた、このトラニオンがそれ以上揺動するのを阻止する為のストッパにこのトラニオンを係合させた状態で、このトラニオンと上記ロッドとの螺合、緊締を行なう事が考えられる。但し、この様にして螺合、緊締を行なう場合、上記トラニオン並びに上記ストッパを介して上記支持板に、上記雄ねじとねじ孔とを螺合、緊締する為の大きな力（雄ねじとねじ孔とに２Ｆｔに基づく力が加わっても緩まない様にする為の大きな力）に基づく力が加わる。   On the other hand, in the case of a structure in which a male screw and a screw hole are provided at the tip of the rod and the central part of the pivot as described above, the trunnion is rotated in order to tighten the male screw and the screw hole so as not to loosen. It is necessary to screw and tighten the trunnion and the rod in a state where they are supported in an impossible manner. In this way, in order to perform screwing and tightening in a state where the trunnion is non-rotatably supported, this stopper is provided on a support plate for supporting the trunnion to prevent the trunnion from further swinging. It is conceivable that the trunnion and the rod are screwed and tightened with the trunnion engaged. However, when screwing and tightening in this way, a large force (to male screw and screw hole) for screwing and tightening the male screw and screw hole to the support plate via the trunnion and the stopper. A force based on a large force for preventing loosening even if a force based on 2 Ft is applied.

そして、この様な力は、上記支持板と固定の部分であるケーシングとの支持部分を支点に、この支持板を回転させる大きなモーメントとして加わる。この為、これら支持板とケーシングとの支持部分の構造を、この様なモーメントに十分耐え得る支持強度を有するものとする必要がある。一方、運転時には、上述の様な雄ねじとねじ孔とを螺合、緊締する際に加わる程の大きなモーメントが上記支持板とケーシングとの支持部分に加わることはない。この為、上述の様に支持板とケーシングとの支持強度を確保する事は、運転時に必要でない強度を確保する事となり（組立時にのみ必要な強度を確保する事となり）、コスト並びに重量低減を図る上から、好ましくない。   Such a force is applied as a large moment for rotating the support plate around the support portion of the support plate and the casing, which is a fixed portion. For this reason, it is necessary that the structure of the support portion between the support plate and the casing has a support strength that can sufficiently withstand such a moment. On the other hand, during operation, a large moment that is applied when the male screw and the screw hole are screwed and tightened as described above is not applied to the support portion between the support plate and the casing. For this reason, securing the support strength between the support plate and the casing as described above secures strength that is not necessary during operation (assuming strength that is necessary only during assembly), and reduces cost and weight. It is not preferable in terms of planning.

一方、この様にケーシングと支持板との支持強度を確保する事なく、上記雄ねじとねじ孔との螺合、緊締を確実に行なう為に、ローディングカム式の押圧装置１９が作動しない状態で、各パワーローラ３、３の周面と入力側、出力側各ディスク１、２の内側面との転がり接触部の面圧を確保する為の、予圧ばね１８（図４〜５参照）の弾性力を大きくする事が考えられる。即ち、この予圧ばね１８の弾性力を大きくした場合には、入力軸２０にローディングナット２１（図４〜５参照）を締め付けた状態で、上記各パワーローラ３、３を上記入力側、出力側各ディスク１、２により強く挟持する事ができる。そして、この様に各パワーローラ３、３を強く挟持した状態で、これら各パワーローラ３、３を支持する各トラニオン４、４とロッド８、８とを螺合、緊締すれば、上記ケーシング１７と支持板１６、１６との支持強度を確保する事なく、雄ねじとねじ孔とを緩みにくく締め付ける事ができる。但し、この場合には、上記ローディングナット２１の締め付けを行なった後でないと、上記トラニオン４、４とロッド８、８との螺合、緊締を行なえなくなり、組立順序が制限される事が避けられない。又、静止状態では、上記各パワーローラ３、３の周面と上記各ディスク１、２の内側面との当接部に十分な油膜が形成されていない（金属同士が接触している）。この状態で上記各トラニオン４、４とロッド８、８とを螺合、緊締すると、接触面に傷が付いて、トロイダル型無段変速機の耐久性が損なわれる可能性がある。従って、組立順序の点を考慮しなくても、上述の様な組立方法は好ましくない。   On the other hand, without securing the support strength between the casing and the support plate in this way, in order to ensure the screwing and tightening of the male screw and the screw hole, the loading cam type pressing device 19 is not operated, Elastic force of the preload spring 18 (see FIGS. 4 to 5) for securing the surface pressure of the rolling contact portion between the peripheral surface of each power roller 3 and 3 and the inner surface of each of the input and output disks 1 and 2. It is possible to increase the size. That is, when the elastic force of the preload spring 18 is increased, the power rollers 3 and 3 are connected to the input side and output side with the loading nut 21 (see FIGS. 4 to 5) fastened to the input shaft 20. The discs 1 and 2 can be strongly held. If the trunnions 4 and 4 and the rods 8 and 8 that support the power rollers 3 and 3 are screwed and tightened in a state where the power rollers 3 and 3 are strongly held in this way, the casing 17 Without securing the support strength between the support plate 16 and the support plate 16, the male screw and the screw hole can be tightened with little difficulty. However, in this case, the trunnions 4 and 4 and the rods 8 and 8 cannot be screwed or tightened until the loading nut 21 is tightened, so that the assembly order is not limited. Absent. In a stationary state, a sufficient oil film is not formed on the contact portion between the peripheral surface of each of the power rollers 3 and 3 and the inner surface of each of the disks 1 and 2 (metals are in contact with each other). If the trunnions 4 and 4 and the rods 8 and 8 are screwed and tightened in this state, the contact surface may be damaged, and the durability of the toroidal continuously variable transmission may be impaired. Therefore, the above assembling method is not preferable without considering the order of assembling.

特開２０００−１８３５５号公報JP 2000-18355 A 特許第３０２２１１１号公報Japanese Patent No. 3022111 特開２００３−１４８５７８号公報JP 2003-148578 A

本発明のトロイダル型無段変速機は、上述の様な事情に鑑みて、アクチュエータに付属のロッドとトラニオンとをねじ止めにより結合する構造で、このトラニオンを支持する為の支持板と固定の部分との支持部分の支持強度を過剰に大きくしなくても、組立順序の自由度を確保し、且つ、パワーローラの周面や各ディスクの内側面を傷付けずに組み立てられる構造を実現すべく発明したものである。   The toroidal continuously variable transmission of the present invention has a structure in which a rod attached to an actuator and a trunnion are coupled by screwing in view of the above-described circumstances, and a support plate and a fixed portion for supporting the trunnion The invention is intended to realize a structure that ensures the degree of freedom of the assembly sequence without excessively increasing the support strength of the support portion and that can be assembled without damaging the peripheral surface of the power roller and the inner surface of each disk. It is a thing.

本発明のトロイダル型無段変速機は何れも、前述した従来から知られているトロイダル型無段変速機と同様に、入力側ディスク及び出力側ディスクと、複数のパワーローラと、複数のトラニオンと、支持板と、複数のアクチュエータと、複数本のロッドとを備える。 このうちの入力側ディスク及び出力側ディスクは、相対回転を自在として互いに同心に支持されている。
又、上記各パワーローラは、上記両ディスク同士の間に挟持されている。
又、上記各トラニオンは、上記各パワーローラを回転自在に支持した状態で、それぞれの両端部に互いに同心に設けた枢軸を中心とする揺動変位を自在とされている。
又、上記支持板は、上記各トラニオンを固定の部分に、上記枢軸の軸方向の変位を可能に支持する為のものである。
又、上記各アクチュエータは、上記各トラニオンを上記各枢軸の軸方向に変位させる為のものである。
又、上記各ロッドは、上記各アクチュエータの動きを上記各トラニオンに伝達する為のものである。
そして、上記各ロッドの先端部分と上記各トラニオンの一端部で上記枢軸の中心部とにそれぞれ設けた雄、雌各ねじ部を螺合する事により、これら各トラニオンと上記各ロッドとを結合している。
特に、本発明のトロイダル型無段変速機に於いては、同一の上記支持板に支持される複数の組の上記トラニオン及びロッドのうち、少なくとも１組のトラニオン及びロッドの上記雄、雌両ねじ部の螺合方向（締め付けの際の回転方向）を、他の組のトラニオン及びロッドの雄、雌両ねじ部の螺合方向と逆にしている。 Each of the toroidal type continuously variable transmissions of the present invention is similar to the above-described conventionally known toroidal type continuously variable transmissions, and includes an input side disk and an output side disk, a plurality of power rollers, and a plurality of trunnions. A support plate, a plurality of actuators, and a plurality of rods. Of these, the input-side disk and the output-side disk are supported concentrically so as to be freely rotatable relative to each other.
The power rollers are sandwiched between the disks.
Further, each trunnion is freely swingable and displaceable around pivots provided concentrically with each other at both ends in a state where the respective power rollers are rotatably supported.
The support plate is for supporting each trunnion on a fixed portion so that the axial displacement of the pivot is possible.
The actuators are for displacing the trunnions in the axial directions of the pivots.
The rods are for transmitting the movements of the actuators to the trunnions.
Then, by screwing the male and female threaded portions provided at the tip of each rod and the central portion of the pivot at one end of each trunnion, the trunnions and the rods are coupled. ing.
In particular, in the toroidal type continuously variable transmission of the present invention, at least one set of trunnion and rod of the male and female screws among the plurality of sets of trunnions and rods supported by the same support plate. The screwing direction (rotating direction at the time of tightening) of the part is opposite to the screwing direction of the male and female screw parts of the other sets of trunnions and rods.

上述の様に構成する本発明のトロイダル型無段変速機によれば、支持板と固定の部分（例えばケーシング）との支持部分の支持強度を過剰に大きくする事なく、組立順序の自由度の向上を図れる。又、トラクション部を構成する各面の損傷防止を図れる。
即ち、螺合方向を逆（例えば、左ねじ、逆ねじ）にした組のトラニオン及びロッドの雄、雌両ねじ部と、逆にしていない（例えば、右ねじ、順ねじの）組のトラニオン及びロッドの雄、雌両ねじ部とを同時に螺合、緊締すれば、上記支持板に加わる締め付け力に基づく力を互いに相殺させる事ができる。この為、この支持板と固定の部分との支持部分に、この支持板を回転させる大きなモーメントが加わる事がなくなり、この支持部分の支持強度を過剰に大きくする必要がなくなる。しかも、前述した様な、ローディングナットを締め付けた後に上記雄、雌両ねじ部の螺合、緊締を行なわなくてはならない等の、組立順序が制限される事もない。更に、パワーローラの周面と各ディスクの内側面とを強く当接させたまま、このパワーローラを支持したトラニオンに、揺動方向の力を加える必要がない。この為、上記両ねじ部の螺合、緊締に伴って、トラクション部を構成する上記各面を傷付ける事がなくなり、組み立てられたトロイダル型無段変速機の耐久性低下を防止できる。 According to the toroidal-type continuously variable transmission of the present invention configured as described above, the degree of freedom in the assembly sequence can be increased without excessively increasing the support strength of the support portion between the support plate and the fixed portion (for example, the casing). Improvements can be made. Moreover, damage prevention of each surface which comprises a traction part can be aimed at.
That is, a pair of trunnions in which the screwing direction is reversed (for example, left-handed screw, reverse-threaded) and both male and female screw portions of the rod, and a pair of trunnions that are not reversed (for example, right-handed screw, forward-threaded) If the male and female screw portions of the rod are screwed together and tightened simultaneously, the forces based on the tightening force applied to the support plate can be offset. Therefore, a large moment for rotating the support plate is not applied to the support portion between the support plate and the fixed portion, and it is not necessary to increase the support strength of the support portion excessively. Moreover, as described above, the assembly order is not limited, for example, the male and female screw portions must be screwed and tightened after the loading nut is tightened. Furthermore, it is not necessary to apply a force in the swinging direction to the trunnion that supports the power roller while keeping the peripheral surface of the power roller and the inner surface of each disk in strong contact. For this reason, the above-mentioned surfaces constituting the traction portion are not damaged when the both screw portions are screwed and tightened, and the durability of the assembled toroidal continuously variable transmission can be prevented.

尚、螺合方向を逆にした組と逆にしていない組とが同数でない（左ねじの組と右ねじの組とが同数でない）場合は、同時に螺合、緊締するトラニオン及びロッドがなくなる（左ねじの組或は右ねじの組のトラニオン及びロッドが残る）。但し、この様な場合でも、螺合、緊締し終わった組のロッドを固定した状態（ロッドに螺合方向の締め付け力を付与した状態）で、残った組のトラニオン及びロッドを螺合、緊締すれば、上記支持板と固定の部分との支持部分に大きなモーメントが加わる事なく、当該残った組のトラニオン及びロッドの螺合、緊締を行なえる。   If the number of the screwed direction is not reversed and the number of the non-reversed pairs are not the same (the number of the left screw and the number of the right screw are not the same), there are no trunnions and rods that are screwed and tightened at the same time ( Left-handed or right-handed trunnions and rods remain). However, even in such a case, the remaining pair of trunnions and rods are screwed and tightened in a state where the rods that have been screwed and tightened are fixed (tightening force in the screwing direction is applied to the rods). In this case, the remaining trunnion and rod can be screwed and tightened without applying a large moment to the support portion between the support plate and the fixed portion.

本発明を実施する場合に好ましくは、請求項２に記載した様に、螺合方向を逆にしたトラニオン及びロッドの組と、逆にしていないトラニオン及びロッドの組とを同数とする。 この様に構成すれば、総てのトラニオン及びロッドに関して、複数組のトラニオンとロッドとを同時に螺合、緊締する事ができ（緊締し終わった組のロッドを固定しつつ、別の組のロッドの螺合、緊締作業を行なう必要がなくなり）、組立時間の短縮を図れる。
又、本発明を実施する場合に好ましくは、請求項３に記載した様に、入力側ディスクと出力側ディスクとの間に２個のパワーローラを挟持し、１対の支持板により２組のトラニオン及びロッドを支持する。或は、請求項４に記載した様に、互いに同期した回転を自在に設けられた１対の外側ディスクと、これら両外側ディスク同士の間にこれら両外側ディスクと同心に且つこれら両外側ディスクとは独立した回転を自在として設けられた内側ディスクとを、それぞれ入力側ディスク及び出力側ディスクとすると共に、それぞれの外側ディスクと内側ディスクとの間にそれぞれ２個づつのパワーローラを挟持する。そして、１対の支持板により４組のトラニオン及びロッドを支持する。
この様に構成すれば、シングルキャビティ型（請求項３）、ダブルキャビティ型（請求項４）、それぞれのトロイダル型無段変速機で、支持板と固定の部分との支持強度を過剰に大きくする事なく、組立順序の自由度の向上を図ると共に、トラクション部を構成する各面の損傷防止を図れると言った、本発明の優れた効果を、特に有効に得る事ができる。 When the present invention is implemented, preferably, the number of trunnions and rods in which the screwing directions are reversed is the same as the number of trunnions and rods in which the screwing directions are not reversed. With this configuration, multiple trunnions and rods can be screwed together and tightened at the same time for all trunnions and rods. Screwing and tightening operations are not required), and the assembly time can be shortened.
When the present invention is implemented, preferably, as described in claim 3, two power rollers are sandwiched between the input side disk and the output side disk, and two sets of support plates are provided by a pair of support plates. Support trunnion and rod. Alternatively, as described in claim 4, a pair of outer disks provided so as to freely rotate in synchronization with each other, and the outer disks concentrically with the outer disks between the outer disks. The inner disk provided with independent rotation is used as an input disk and an output disk, respectively, and two power rollers are sandwiched between the outer disk and the inner disk. Then, four pairs of trunnions and rods are supported by a pair of support plates.
With this configuration, the support strength between the support plate and the fixed portion is excessively increased in the single cavity type (Claim 3), the double cavity type (Claim 4), and the respective toroidal type continuously variable transmissions. In addition, it is possible to particularly effectively obtain the excellent effect of the present invention that it is possible to improve the degree of freedom of the assembly order and to prevent damage to each surface constituting the traction portion.

図１〜３は、本発明の実施例を示している。尚、本発明の特徴は、トラニオン４を支持する為の１対の支持板１６、１６と固定の部分であるケーシング１７（図４、６参照）との支持部分の支持強度を過剰に大きくする事なく、組立順序の自由度の向上を図ると共に、トラクション部を構成する各面の損傷防止を図るべく、上記トラニオン４の一端部（図１〜２の下端部）に設けた枢軸５と、アクチュエータ６に付属のロッド８との結合部の構造を工夫する点にある。その他の部分の構造及び作用は、前述の図４〜６に示した構造を含め、従来から広く知られているトロイダル型無段変速機と同様であるから、同等部分に関する図示並びに説明は省略し、以下、本発明の特徴部分及び先に説明しなかった部分を中心に説明する。   1 to 3 show an embodiment of the present invention. The feature of the present invention is that the support strength of the support portion between the pair of support plates 16 and 16 for supporting the trunnion 4 and the casing 17 (see FIGS. 4 and 6) which is a fixed portion is excessively increased. The pivot 5 provided at one end of the trunnion 4 (the lower end of FIGS. 1 and 2) in order to improve the degree of freedom of the assembly order and prevent damage to each surface constituting the traction unit, The point is to devise the structure of the connecting portion with the rod 8 attached to the actuator 6. The structure and operation of the other parts are the same as those of the toroidal type continuously variable transmission that has been widely known, including the structure shown in FIGS. Hereinafter, the characteristic part of the present invention and the part not described above will be mainly described.

内側面（図１の右側面）にパワーローラ３を回転自在に支持したトラニオン４の両端部に互いに同心に設けた枢軸５、５を、１対の支持板１６、１６に設けた支持孔２２、２２内に、ラジアルニードル軸受２３、２３により支持している。従って上記トラニオン４は、上記各枢軸５、５の軸方向（図１〜２の上下方向）移動及びこれら各枢軸５、５を中心とする揺動変位自在である。そして、油圧式のアクチュエータ６により上記トラニオン４を、ロッド８を介して、上記各枢軸５、５の軸方向に駆動自在としている。   Support holes 22 provided in a pair of support plates 16 and 16 are provided with pivots 5 and 5 provided concentrically with each other at both ends of the trunnion 4 that rotatably supports the power roller 3 on the inner side surface (right side surface in FIG. 1). , 22 are supported by radial needle bearings 23, 23. Therefore, the trunnion 4 is freely movable in the axial direction (vertical direction in FIGS. 1 and 2) of the pivots 5 and 5 and swinging and displacing around the pivots 5 and 5. The trunnion 4 can be driven in the axial direction of the pivots 5 and 5 via a rod 8 by a hydraulic actuator 6.

この為に、このロッド８の先端部中間寄り部分に設けた雄ねじ部２４を、上記トラニオン４の一端部（図１〜２の下端部）で上記枢軸５の中心部に設けた雌ねじ部２５に螺合する事により、上記トラニオン４と上記ロッド８とを結合している。この為に、上記枢軸５の中心部に有底の円孔２６を、上記トラニオン４の一端部を軸方向に貫通しない状態で設けている。即ち、このトラニオン４は、上記パワーローラ３を支持する為の支持板部２７の両端部に、それぞれがこの支持板部２７の内側面側（図１の右側）に向け突出した、１対の枢支壁部２８、２８を形成している。上記各枢軸５、５は、これら両枢支壁部２８、２８の外側面（互いに反対側の側面）に、互いに同心に設けている。上記円孔２６は、上記一端部側の枢軸５の先端面（図１〜２の下端面）にのみ開口し、上記枢支壁部２８の内側面側に開口しない状態で形成している。   For this purpose, the male threaded portion 24 provided near the middle of the tip of the rod 8 is replaced with a female threaded portion 25 provided at the center of the pivot 5 at one end of the trunnion 4 (lower end in FIGS. 1 and 2). The trunnion 4 and the rod 8 are joined by screwing. For this purpose, a bottomed circular hole 26 is provided in the central portion of the pivot shaft 5 so as not to penetrate one end portion of the trunnion 4 in the axial direction. That is, the trunnion 4 is a pair of protrusions projecting toward the inner side (right side in FIG. 1) of the support plate 27 at both ends of the support plate 27 for supporting the power roller 3. The pivot wall portions 28 and 28 are formed. The pivots 5 and 5 are provided concentrically with each other on the outer surfaces (side surfaces opposite to each other) of the pivot support walls 28 and 28. The circular hole 26 is formed so as to open only at the distal end surface (the lower end surface in FIGS. 1 and 2) of the pivot 5 on the one end side and not open on the inner surface side of the pivot wall 28.

そして、上記円孔２６の内周面の開口寄り部分に、上記雌ねじ部２５を形成している。これに対して、この円孔２６の一部でこの雌ねじ部２５よりも奥側部分に、内径側円筒面部２９を形成している。この内径側円筒面部２９は、この雌ねじ部２５の山径よりも小さな内径で、この雌ねじ部２５と同心に形成されている。一方、上記ロッド８の先端部で上記雄ねじ部２４よりも突出した部分に、外径側円筒面部３０を形成している。この外径側円筒面部３０は、上記雄ねじ部２４と同心で、上記内径側円筒面部２９にがたつきなく内嵌自在である。この為に、上記外径側円筒面部３０の自由状態での外径を、上記内径側円筒面部２９の自由状態での内径と同じか、この内径よりも僅かに大きくしている。又、上記雌ねじ部２５の軸方向長さＬ₂₅よりも、上記外径側円筒面部３０の軸方向長さＬ₃₀を長く（Ｌ₂₅＜Ｌ₃₀）している。この為、上記ロッド８とトラニオン４とを結合する場合、図２に示す様に、上記雌ねじ部２５に上記雄ねじ部２４が螺合し始めるよりも先に、上記外径側円筒面部３０が上記内径側円筒面部２９に嵌合し始める。 The female screw portion 25 is formed in a portion near the opening of the inner peripheral surface of the circular hole 26. On the other hand, an inner diameter side cylindrical surface portion 29 is formed in a part of the circular hole 26 in the back side portion of the female screw portion 25. The inner diameter side cylindrical surface portion 29 has an inner diameter smaller than the crest diameter of the female screw portion 25 and is formed concentrically with the female screw portion 25. On the other hand, an outer-diameter cylindrical surface portion 30 is formed in a portion protruding from the male screw portion 24 at the tip portion of the rod 8. The outer diameter side cylindrical surface portion 30 is concentric with the male screw portion 24 and can be fitted inside the inner diameter side cylindrical surface portion 29 without rattling. Therefore, the outer diameter of the outer diameter side cylindrical surface portion 30 in the free state is the same as or slightly larger than the inner diameter of the inner diameter side cylindrical surface portion 29 in the free state. Further, the axial length L 30 of the outer diameter side cylindrical surface portion ₃₀ is longer than the axial length L _{25 of the} female screw portion 25 (L ₂₅ <L ₃₀ ). For this reason, when the rod 8 and the trunnion 4 are coupled, as shown in FIG. 2, the outer-diameter cylindrical surface portion 30 is connected to the outer screw side 25 before the male screw portion 24 starts to be screwed. It starts to fit into the inner diameter side cylindrical surface portion 29.

一方、前記アクチュエータ６は、ケーシング１７内に固定したシリンダボディー３１（図４、６参照）に設けたシリンダ３２（図６参照）内にピストン１３を、軸方向（図１〜２の上下方向）の移動を自在に、油密に嵌装する事で構成している。上記アクチュエータ６は、上記シリンダ３２内で上記ピストン１３により仕切られた１対の油圧室３３ａ、３３ｂ（図６参照）内への油圧の給排によりこのピストン１３を軸方向に変位させ、上記ロッド８を押し引きする様に構成している。このピストン１３の動きをこのロッド８に伝達する為に、このピストン１３の中心部に円筒部３４を設け、この円筒部３４にこのロッド８を挿通している。そして、上記雄ねじ部２４と上記雌ねじ部２５とを螺合し更に緊締した状態で上記円筒部３４を、上記ロッド８の基端部に設けられた外向フランジ状の鍔部３５と、前記一端側の枢軸５の端面との間で、軸方向両側から挟持している。本実施例の場合には、この枢軸５の端面と上記円筒部３４の端面との間に、ワッシャ３６を挟持している。又、前記トラニオン４の内部と上記ロッド８の中心部とに潤滑油通路３７を設けて、前記パワーローラ３の回転支持部に、潤滑油を供給自在としている。   On the other hand, the actuator 6 moves the piston 13 in the cylinder 32 (see FIG. 6) provided in the cylinder body 31 (see FIGS. 4 and 6) fixed in the casing 17 in the axial direction (vertical direction in FIGS. 1 and 2). It is configured by fitting it freely and oil-tightly. The actuator 6 displaces the piston 13 in the axial direction by supplying and discharging hydraulic pressure into a pair of hydraulic chambers 33a and 33b (see FIG. 6) partitioned by the piston 13 in the cylinder 32, and the rod 8 is pushed and pulled. In order to transmit the movement of the piston 13 to the rod 8, a cylindrical portion 34 is provided at the center of the piston 13, and the rod 8 is inserted through the cylindrical portion 34. Then, in a state where the male screw portion 24 and the female screw portion 25 are screwed together and further tightened, the cylindrical portion 34 is connected to an outward flange-like flange portion 35 provided at the proximal end portion of the rod 8 and the one end side. It is clamped from both ends in the axial direction. In this embodiment, a washer 36 is sandwiched between the end surface of the pivot 5 and the end surface of the cylindrical portion 34. Further, a lubricating oil passage 37 is provided in the trunnion 4 and in the central portion of the rod 8 so that the lubricating oil can be supplied to the rotation support portion of the power roller 3.

更に、本実施例の場合には、図３に模式的に示す様に、前記１対の支持板１６、１６に支持される複数の組（本実施例の場合は４組）のトラニオン４、４及びロッド８、８のうちで、少なくとも１組（本実施例の場合は２組）のトラニオン４、４及びロッド８、８の雄、雌両ねじ部２４、２５の螺合方向を、他の組（本実施例の場合は他の２組）のトラニオン４、４及びロッド８、８の雄、雌両ねじ部２４、２５の螺合方向と逆にしている。即ち、図３（Ａ）に、上記各支持板１６、１６に支持された、それぞれのトラニオン４、４及びロッド８、８の雄、雌両ねじ部２４、２５の螺合方向を矢印で示す様に、矩形状の上記支持板１６の幅方向（図３の上下方向）並びに長さ方向（図３の左右方向）にそれぞれ隣り合う雄、雌両ねじ部２４、２５の螺合方向を互いに逆にしている。尚、同図（Ｂ）に同じく矢印で示す様に、矩形状の上記支持板１６の幅方向に隣り合う雄、雌両ねじ部２４、２５の螺合方向を互いに逆にしても良い。又、本実施例の場合は、螺合方向を逆にした組と逆にしていない組とを同数（２組づつ）としているが、上記１対の支持板１６、１６に支持される４組のうちの何れか１組のみのトラニオン４及びロッド８の雄、雌両ねじ部２４、２５の螺合方向を、他の３組のトラニオン４、４及びロッド８、８の雄、雌両ねじ部２４、２５の螺合方向と逆にしても良い。又、上記各トラニオン４、４と各ロッド８、８と螺合、緊締は、上記各支持板１６、１６に設けた、上記各トラニオン４、４がそれ以上揺動するのを阻止する為のストッパ（図示省略）に、これら各トラニオン４、４を係合させた（突き当てた）状態で行なう。   Further, in the case of the present embodiment, as schematically shown in FIG. 3, a plurality of trunnions 4 (four pairs in the present embodiment) supported by the pair of support plates 16 and 16, 4 and rods 8 and 8, at least one set (two sets in this embodiment) of trunnions 4 and 4 and rods 8 and 8, both male and female screw portions 24 and 25 are screwed in other directions. Of the trunnions 4 and 4 and the rods 8 and 8 of the pair (in the case of the present embodiment) are opposite to the screwing directions of the male and female screw portions 24 and 25. That is, in FIG. 3A, the screwing directions of the male and female screw portions 24 and 25 of the trunnions 4 and 4 and the rods 8 and 8 supported by the support plates 16 and 16 are indicated by arrows. Similarly, the screwing directions of the male and female screw portions 24 and 25 adjacent to each other in the width direction (vertical direction in FIG. 3) and the length direction (left and right direction in FIG. 3) of the support plate 16 having a rectangular shape are set to each other. It is reversed. Similarly, as indicated by the arrows in FIG. 5B, the screwing directions of the male and female screw portions 24 and 25 adjacent to each other in the width direction of the rectangular support plate 16 may be reversed. In the case of the present embodiment, the same number (two sets) of the groups in which the screwing directions are reversed and the groups in which the screwing directions are not reversed, is four groups supported by the pair of support plates 16, 16. Only one set of the trunnion 4 and rod 8 male and female screw portions 24 and 25 are screwed in the other three sets of trunnions 4 and 4 and the rods 8 and 8 male and female both screws. You may make it reverse to the screwing direction of the parts 24 and 25. FIG. The trunnions 4 and 4 and the rods 8 and 8 are screwed together and tightened to prevent the trunnions 4 and 4 provided on the support plates 16 and 16 from further swinging. This is performed in a state where these trunnions 4 and 4 are engaged (abutted) on a stopper (not shown).

上述の様に構成する本発明のトロイダル型無段変速機によれば、上記支持板１６、１６とケーシング１７との支持部分の支持強度を過剰に大きくする事なく、組立順序の自由度の向上を図れる。又、各ディスク１、２の内側面と各パワーローラ３、３の周面とを（図５参照）強く当接させたまま、上記雄、雌両ねじ部２４、２５を緊締する必要がないので、トラクション部を構成する上記各面に、擦傷等の損傷が生じる事を防止できる。
即ち、螺合方向を逆（例えば、左ねじ、逆ねじ）にした組のトラニオン４、４及びロッド８、８の雄、雌両ねじ部２４、２５と、逆にしていない（例えば、右ねじ、順ねじの）組のトラニオン４、４及びロッド８、８の雄、雌両ねじ部２４、２５とを同時に螺合、緊締すれば、上記支持板１６、１６に加わる締め付け力に基づく力を互いに相殺させる事ができる。この為、上記支持板１６、１６とケーシング１７との支持部分に、この支持板１６、１６を回転させる大きなモーメントが加わる事がなくなり、この支持部分の支持強度を過剰に大きくする必要がなくなる。しかも、前述した様なローディングナット２１（図４、５参照）を締め付けた後に上記雄、雌両ねじ部２４、２５の螺合、緊締を行なわなくてはならない等の、組立順序が制限される事もない。又、上記各面を損傷する事もなくなる。 According to the toroidal-type continuously variable transmission of the present invention configured as described above, the degree of freedom in the assembly sequence is improved without excessively increasing the support strength of the support portion between the support plates 16 and 16 and the casing 17. Can be planned. Further, it is not necessary to tighten the male and female screw portions 24 and 25 while keeping the inner surfaces of the disks 1 and 2 and the peripheral surfaces of the power rollers 3 and 3 in strong contact (see FIG. 5). Therefore, damage such as scratches can be prevented from occurring on each of the surfaces constituting the traction portion.
That is, the trunnions 4 and 4 and the male and female threaded portions 24 and 25 of the rods 8 and 8 of the set in which the screwing directions are reversed (for example, left-handed screw and reverse-threaded) are not reversed (for example, right-handed screws). When the trunnions 4 and 4 and the male and female screw portions 24 and 25 of the rods 8 and 8 are screwed and tightened at the same time, a force based on the tightening force applied to the support plates 16 and 16 is obtained. Can cancel each other. Therefore, a large moment for rotating the support plates 16 and 16 is not applied to the support portion between the support plates 16 and 16 and the casing 17, and it is not necessary to increase the support strength of the support portion excessively. In addition, the assembly order is limited such that the male and female screw portions 24 and 25 must be screwed and tightened after the loading nut 21 (see FIGS. 4 and 5) is tightened. There is nothing. In addition, the above surfaces are not damaged.

尚、螺合方向を逆にしたトラニオン４、４及びロッド８、８の組と逆にしていないトラニオン４、４及びロッド８、８の組とが同数でない（左ねじの組と右ねじの組とが同数でない）場合は、同時に螺合、緊締するトラニオン４及びロッド８がなくなる（左ねじの組或は右ねじの組のトラニオン４及びロッド８が残る）。但し、この様な場合でも、螺合、緊締し終わった組のロッド８を固定した状態（螺合方向の締め付け力を付与した状態）で、残った組のトラニオン４及びロッド８を螺合、緊締すれば、上記支持板１６、１６とケーシング１７との支持部分に大きなモーメントが加わる事なく、当該残った組のトラニオン４及びロッド８の螺合、緊締を行なえる。   It should be noted that the trunnions 4, 4 and the rods 8, 8 with the screwing directions reversed are not the same in number as the trunnions 4, 4, and the rods 8, 8 with the opposite directions (the left screw set and the right screw set). Are not the same number), the trunnion 4 and the rod 8 which are screwed and tightened at the same time are eliminated (the trunnion 4 and the rod 8 of the left screw set or the right screw set remain). However, even in such a case, the remaining set of trunnions 4 and rods 8 are screwed together in a state where the set of rods 8 that have been screwed and tightened are fixed (tightening force in the screwing direction). If tightened, the remaining trunnion 4 and rod 8 can be screwed and tightened without applying a large moment to the support portion between the support plates 16 and 16 and the casing 17.

又、本実施例は、前述の図４〜６に示した様な、互いに同期した回転を自在に設けられた１対の外側ディスクを入力側ディスク１、１とし、これら両外側ディスク同士の間にこれら両外側ディスクと同心に且つこれら両外側ディスクとは独立した回転を自在として設けられた内側ディスクを出力側ディスク２、２とした、所謂ダブルキャビティ型のトロイダル型無断変速機に本発明を適用した場合を示した。但し。この様な構造に限定されず、１対のディスク（入力側ディスクと出力側ディスクと）の間にパワーローラを挟持した、所謂シングルキャビティ型のトロイダル型無断変速機に本発明を適用する事もできる。この場合には、例えば１対の支持板により２組のトラニオン及びロッドを支持し、一方の組のトラニオン及びロッドの雄、雌両ねじ部の螺合方向を、他方の組のトラニオン及びロッドの雄、雌両ねじ部の螺合方向と逆にする（一方の組を左ねじとすると共に、他方の組を右ねじとする）。
又、本実施例の場合は、ロッド８の先端部中間寄り部分に雄ねじ部２４を設けると共に、トラニオン４の枢軸５の中心部に雌ねじ部２５を設けているが、ロッドの先端部に雌ねじ部を設けると共に、トラニオンの枢軸の中心部に雄ねじ部を設けても良い。 Further, in this embodiment, as shown in FIGS. 4 to 6 described above, a pair of outer disks that are provided to freely rotate in synchronization with each other are used as input disks 1 and 1, and between these outer disks. Further, the present invention is a so-called double-cavity toroidal continuously variable transmission in which inner disks provided concentrically with these outer disks and independently rotatable with the outer disks are output-side disks 2 and 2. Shown when applied. However. The present invention is not limited to such a structure, and the present invention may be applied to a so-called single-cavity toroidal type continuously variable transmission in which a power roller is sandwiched between a pair of disks (an input disk and an output disk). it can. In this case, for example, two pairs of trunnions and rods are supported by a pair of support plates, and the screwing direction of both male and female screw portions of one pair of trunnions and rods is set to the other pair of trunnions and rods. The screwing direction of both male and female screw parts is reversed (one set is a left-hand thread and the other set is a right-hand thread).
In the case of this embodiment, the male screw portion 24 is provided at the middle portion of the tip end portion of the rod 8 and the female screw portion 25 is provided at the central portion of the pivot 5 of the trunnion 4, but the female screw portion is provided at the tip portion of the rod. And a male screw portion may be provided at the central portion of the trunnion pivot.

本発明の実施例を示す、図６の左部に相当する断面図。Sectional drawing equivalent to the left part of FIG. 6 which shows the Example of this invention. ロッドとトラニオンとの結合工程を示す、図１のＡ部に相当する図。The figure corresponded to the A section of FIG. 1 which shows the coupling | bonding process of a rod and a trunnion. ロッド及びトラニオンの螺合方向の配置の２例を示す、図６の下から見た模式図。The schematic diagram seen from the bottom of FIG. 6 which shows two examples of arrangement | positioning of the screwing direction of a rod and a trunnion. 従来から知られているトロイダル型無段変速機の１例を示す断面図。Sectional drawing which shows an example of the toroidal type continuously variable transmission conventionally known. 図４のＢ−Ｂ断面図。BB sectional drawing of FIG. 同Ｃ−Ｃ断面図。CC sectional drawing. 図６の左側のトラニオン及びこのトラニオンに付属の部品を取り出して示す断面図。FIG. 7 is a cross-sectional view showing a left trunnion of FIG. 6 and parts attached to the trunnion.

符号の説明Explanation of symbols

１ 入力側ディスク
２ 出力側ディスク
３ パワーローラ
４ トラニオン
５ 枢軸
６ アクチュエータ
７ 制御弁
８ ロッド
９ プリセスカム
１０ リンク腕
１１ 支持孔
１２ ピン
１３ ピストン
１４ 円筒部
１５ ナット
１６ 支持板
１７ ケーシング
１８ 予圧ばね
１９ 押圧装置
２０ 入力軸
２１ ローディングナット
２２ 支持孔
２３ ラジアルニードル軸受
２４ 雄ねじ部
２５ 雌ねじ部
２６ 円孔
２７ 支持板部
２８ 枢支壁部
２９ 内径側円筒面部
３０ 外径側円筒面部
３１ シリンダボディー
３２ シリンダ
３３ａ、３３ｂ 油圧室
３４ 円筒部
３５ 鍔部
３６ ワッシャ
３７ 潤滑油通路

DESCRIPTION OF SYMBOLS 1 Input side disk 2 Output side disk 3 Power roller 4 Trunnion 5 Pivot 6 Actuator 7 Control valve 8 Rod 9 Precess cam 10 Link arm 11 Support hole 12 Pin 13 Piston 14 Cylindrical part 15 Nut 16 Support plate 17 Casing 18 Preload spring 19 Pressing device DESCRIPTION OF SYMBOLS 20 Input shaft 21 Loading nut 22 Support hole 23 Radial needle bearing 24 Male thread part 25 Female thread part 26 Circular hole 27 Support plate part 28 Pivot wall part 29 Inner diameter side cylindrical surface part 30 Outer diameter side cylindrical surface part 31 Cylinder body 32 Cylinder 33a, 33b Hydraulic chamber 34 Cylindrical part 35 Ridge part 36 Washer 37 Lubricating oil passage

Claims (4)

相対回転を自在として互いに同心に支持された入力側ディスク及び出力側ディスクと、これら両ディスク同士の間に挟持された複数のパワーローラと、これら各パワーローラを回転自在に支持した状態でそれぞれの両端部に互いに同心に設けた枢軸を中心とする揺動変位を自在とされた複数のトラニオンと、これら各トラニオンを固定の部分に、上記枢軸の軸方向の変位を可能に支持する為の支持板と、上記各トラニオンを上記各枢軸の軸方向に変位させる為の複数のアクチュエータと、これら各アクチュエータの動きを上記各トラニオンに伝達する為の複数本のロッドとを備え、これら各ロッドの先端部分と上記各トラニオンの一端部で上記枢軸の中心部とにそれぞれ設けた雄、雌両ねじ部を螺合する事により、これら各トラニオンと上記各ロッドとを結合したトロイダル型無段変速機に於いて、同一の上記支持板に支持される複数の組の上記トラニオン及びロッドのうち、少なくとも１組のトラニオン及びロッドの上記雄、雌両ねじ部の螺合方向を、他の組のトラニオン及びロッドの雄、雌両ねじ部の螺合方向と逆にした事を特徴とするトロイダル型無段変速機。   Each of the input side disk and the output side disk supported concentrically so that relative rotation can be freely performed, a plurality of power rollers sandwiched between these two disks, and each of these power rollers supported in a rotatable manner. A plurality of trunnions that are swingable around a pivot that is concentric with each other at both ends, and a support for supporting each trunnion on a fixed portion so that the pivot can be displaced in the axial direction. A plate, a plurality of actuators for displacing the trunnions in the axial direction of the pivots, and a plurality of rods for transmitting the movements of the actuators to the trunnions. By screwing the male and female screw portions respectively provided at the center and the central portion of the pivot at one end of each trunnion, each trunnion and the above trunnion In a toroidal-type continuously variable transmission coupled with a rod, at least one of the trunnion and rod of the plurality of trunnions and rods supported by the same support plate, the male and female screw portions of the rod A toroidal-type continuously variable transmission characterized in that the screwing direction is reversed to the screwing direction of the male and female screw portions of the other trunnion and rod. 螺合方向を逆にしたトラニオン及びロッドの組と、逆にしていないトラニオン及びロッドの組とを同数とした、請求項１に記載したトロイダル型無段変速機。   The toroidal continuously variable transmission according to claim 1, wherein the number of trunnions and rods whose screwing directions are reversed and the number of trunnions and rods not reversed are the same. 入力側ディスクと出力側ディスクとの間に２個のパワーローラを挟持し、１対の支持板により２組のトラニオン及びロッドを支持した、請求項１〜２の何れかに記載したトロイダル型無段変速機。   3. A toroidal type non-transmission unit according to claim 1, wherein two power rollers are sandwiched between the input side disk and the output side disk, and two pairs of trunnions and rods are supported by a pair of support plates. Step transmission. 互いに同期した回転を自在に設けられた１対の外側ディスクと、これら両外側ディスク同士の間にこれら両外側ディスクと同心に且つこれら両外側ディスクとは独立した回転を自在として設けられた内側ディスクとを、それぞれ入力側ディスク及び出力側ディスクとすると共に、それぞれの外側ディスクと内側ディスクとの間にそれぞれ２個づつのパワーローラを挟持し、１対の支持板により４組のトラニオン及びロッドを支持した、請求項１〜２の何れかに記載したトロイダル型無段変速機。
A pair of outer disks that are freely rotatable in synchronization with each other, and an inner disk that is concentrically provided between these outer disks and that can be rotated independently of these outer disks. Are set as an input side disk and an output side disk, respectively, and two power rollers are sandwiched between each outer disk and inner disk, and four pairs of trunnions and rods are connected by a pair of support plates. The toroidal continuously variable transmission according to claim 1, which is supported.

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