WO2006003886A1 - Toroidal type stepless speed change device - Google Patents

Toroidal type stepless speed change device Download PDF

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Publication number
WO2006003886A1
WO2006003886A1 PCT/JP2005/011831 JP2005011831W WO2006003886A1 WO 2006003886 A1 WO2006003886 A1 WO 2006003886A1 JP 2005011831 W JP2005011831 W JP 2005011831W WO 2006003886 A1 WO2006003886 A1 WO 2006003886A1
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WO
WIPO (PCT)
Prior art keywords
swing
supported
toroidal
continuously variable
concave
Prior art date
Application number
PCT/JP2005/011831
Other languages
French (fr)
Japanese (ja)
Inventor
Hiroki Nishii
Original Assignee
Nsk Ltd.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nsk Ltd. filed Critical Nsk Ltd.
Priority to DE112005001589T priority Critical patent/DE112005001589B4/en
Publication of WO2006003886A1 publication Critical patent/WO2006003886A1/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H15/00Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by friction between rotary members
    • F16H15/02Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by friction between rotary members without members having orbital motion
    • F16H15/04Gearings providing a continuous range of gear ratios
    • F16H15/06Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B
    • F16H15/32Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B in which the member B has a curved friction surface formed as a surface of a body of revolution generated by a curve which is neither a circular arc centered on its axis of revolution nor a straight line
    • F16H15/36Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B in which the member B has a curved friction surface formed as a surface of a body of revolution generated by a curve which is neither a circular arc centered on its axis of revolution nor a straight line with concave friction surface, e.g. a hollow toroid surface
    • F16H15/38Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B in which the member B has a curved friction surface formed as a surface of a body of revolution generated by a curve which is neither a circular arc centered on its axis of revolution nor a straight line with concave friction surface, e.g. a hollow toroid surface with two members B having hollow toroid surfaces opposite to each other, the member or members A being adjustably mounted between the surfaces

Definitions

  • the toroidal continuously variable transmission according to the present invention is used as a transmission unit that constitutes an automatic transmission device for a vehicle (automobile), for example.
  • FIGS. 5 to 8 show a toroidal continuously variable transmission for a four-wheel drive vehicle with a large displacement described in Patent Document 1.
  • FIG. This toroidal continuously variable transmission 1 includes three first power rollers 4 and 4 between a first input disk 2 and a first output disk 3, and a second input disk 5 and a second output. Three second power rollers 7 are respectively provided between the side disk 6 and a total of six power rollers 4 and 7 transmit power.
  • a torque converter 8 that is a starting clutch is provided at the most front stage in the power transmission direction, and the toroidal-type continuously variable transmission is provided at the output of the torque converter 8.
  • the front half 9a is driven to rotate by the torque converter 8 as the traveling engine (not shown) rotates.
  • the rear half 9b of the input shaft 9 is supported on the rear end of the front half 9a so as to be concentric with each other and relatively rotatable.
  • a forward / reverse switching unit 10 for switching between forward and backward movement is provided in series between the front half portion 9a and the rear half portion 9b in the power transmission direction.
  • This forward / reverse switching unit 10 which is a planetary gear mechanism, switches between a forward state and a reverse state by selecting and connecting a forward clutch 11 and a reverse clutch 12, each of which is a wet multi-plate clutch. .
  • the above-described forward / reverse switching unit 10 has a A toroidal continuously variable transmission 1 is provided.
  • the toroidal continuously variable transmission 1 has an input portion connected to the output portion of the forward / reverse switching unit 10 and an output portion, that is, a portion connected to the front wheel drive shaft 13 and the rear wheel drive shaft 14.
  • the gear ratio between is continuously changed.
  • the toroidal continuously variable transmission 1 is provided around the latter half 9b. That is, the first and second input side disks 2 and 5 are concentric with each other in the state where the inner side surfaces, which are concave surfaces each having an arcuate cross section, face each other in the vicinity of both front and rear end portions of the latter half portion 9b.
  • the first input side disk 2 provided on the front side is spline-engaged with the base end portion of the carrier 15 constituting the forward / reverse switching unit 10 and also moved forward. Is blocked.
  • the second input side disk 5 provided on the rear side is supported on the rear end portion of the rear half portion 9b via the ball spline 16. Then, the second input disk 5 is pressed toward the first input disk 2 by a hydraulic opening device 17 so as to be freely pressed.
  • a support cylinder 18 is provided concentrically with the latter half 9b around the middle part of the latter half 9b.
  • the support cylinder 18 is supported and fixed at both ends by the inner diameter side ends of the stays 19 and 19.
  • These stays 19 and 19 support and fix their outer diameter side ends to support rings 20 and 20 described later, respectively, and first and second swing frames 21 and 22 described later also swing themselves.
  • the first and second support frames 23 and 24 are configured to support each other.
  • the latter half 9b is supported inside the support cylinder 18, and the first and second output side disks 3 and 6 are supported around the support cylinder 18 so as to be freely rotatable and axially displaceable. Yes. Further, these output side disks 3 and 6 can freely rotate relative to each other while supporting the axial load applied between them by a thrust bearing provided therebetween.
  • a front wheel output gear 25 is fixed to the outer surface side of the first output side disk 3, and the front wheel output gear 25 and the front wheel drive shaft 13 are connected via a front wheel driven gear 26.
  • the front output shaft 13 can be driven to rotate by the first output side disk 3. Further, the rotation of the front wheel drive shaft 13 can be transmitted to a front wheel (not shown) via a front wheel differential gear 27.
  • a rear wheel output gear 28 is fixed to the outer surface side of the second output side disk 6, and the rear wheel output gear 28 and the rear wheel drive shaft 14 are connected to each other.
  • the rear wheel driven shaft 29 is engaged, and the second output side disk 6 allows the rear wheel drive shaft 14 to be rotationally driven.
  • the rotation of the rear wheel drive shaft 14 can be transmitted to the rear wheels via a rear wheel differential gear (not shown).
  • first power rollers 4, 4 are provided between the inner side surface of the first input side disc 2 and the inner side surface of the first output side disc 3, and the second input side disc.
  • the three second power rollers 7 are sandwiched between the inner surface of 5 and the inner surface of the second output side disk 6.
  • the first and second power rollers 4 and 7 are respectively provided on the inner surfaces of the first and second trolleys 30 and 31, respectively, with the displacement shafts 32 and 32 provided in a state where the inner surface force protrudes. It is supported so that it can rotate freely.
  • These first and second traons 30 and 31 do not intersect the central axes of the disks 2, 5, 3, and 6 provided concentrically with each other at both ends.
  • First and second pivots 33 (second pivots not shown) present at twisted positions at right angles to or near right angles to the directions of the central axes of 2, 5, 3, 6 Rocks around the center.
  • the first and second troons 30 and 31 are supported at both ends of the first and second swing frames 21 and 22 so as to be swingably displaceable.
  • the disk 2, 5, 3, 6 is supported so as to be swingable and displaceable about a support shaft 34, 34 provided in a direction parallel or nearly parallel to the central axis of the disk 2, 5, 3, 6.
  • Each of the first and second support frames 23 and 24 has a pair of support rings 20 and 20 arranged in parallel to each other, outside the three support portions 35 and 35 constituting the stay 19. They are connected to each other through the radial end.
  • the support shafts 34 and 34 constitute the first and second support frames 23 and 24 at intermediate positions of the support columns 35 and 35 in the circumferential direction of the support rings 20 and 20, respectively.
  • a pair of support rings 20 and 20 are spanned between each other. Accordingly, the first and second swing frames 21 and 22 are swingably supported between the column portions 35 and 35 adjacent to each other in the circumferential direction.
  • first and second swing frames 21 and 22 are provided with hydraulic cylinders 36a and 36b provided between both ends of the swing frames 21 and 22 and the support rings 20 and 20, respectively. This makes it possible to swing and displace freely.
  • These hydraulic cylinders 36a and 36b are respectively connected to the support rings 20 and 2 respectively. A part of 0 is provided at a position aligned with both end portions of the swing frames 21 and 22.
  • rods 37a and 37b are arranged in parallel with the support shafts 34 and 34 at the ends of the first and second swing frames 21 and 22 that are aligned with the hydraulic cylinders 36a and 36b.
  • the first and second swing frames 21 and 22 are supported and fixed so as to penetrate both end portions.
  • a control valve 39 for controlling supply and discharge of pressure oil to and from the hydraulic cylinders 36a and 36b is supported by the support rings 20 and 20, respectively.
  • the cam face 40 provided on the control valve 39 displaces the spool 42 of the control valve 39 via the plunger 41 attached to the control valve 39 to switch the control valve 39.
  • the sleeve 43 that constitutes the control valve 39 together with the spool 42 is displaced to a predetermined position by the control motor 44 so that a desired gear ratio can be realized at the time of shifting.
  • Such a control valve 39 and a control motor 44 are provided on the first input side disk 2 and the first output side disk 3, and one on the second input side.
  • One on the second cavity 46 side which includes the disk 5 and the second output side disk 6, and two toroidal-type continuously variable transmissions 1 as a whole.
  • a control motor 39 on the first cavity 45 side is provided with the control valve 39 on the first cavity 45 side, and a control valve 39 on the second cavity 46 side is provided on the control motor 44 on the second cavity 46 side.
  • the control is performed in synchronization with each other (in a straight traveling state) or independently of each other (in a turning state).
  • a contact ellipse formed on a rolling contact portion (traction portion) between the peripheral surface of each of the power rollers 4 and 7 and the inner surface of each of the disks 2, 5, 3, 6 is the disc 2, 5, It becomes easy to ride on the edge of 3 and 6, and each of these power rollers 4 and 7 and each disk 2, 5, 3, 6 It becomes easy to cause damage based on edge load. Such damage is undesirable because it reduces the durability of each of the power rollers 4 and 7 and the disks 2, 5, 3, and 6.
  • Patent Document 1 Japanese Patent Laid-Open No. 2001-165262
  • Patent Document 2 Japanese Utility Model Publication No. 6-43404
  • the toroidal continuously variable transmission of the present invention has been invented to realize a structure having excellent durability by preventing the power roller from being excessively inclined in view of the above-described circumstances. is there.
  • a toroidal continuously variable transmission includes an input side disk and an output side disk, a plurality of trons, and a plurality of power rollers.
  • the input-side disk and the output-side disk are concentric and independent of each other with their inner surfaces facing each other, which are concave surfaces having a circular arc cross section. It is supported to roll freely.
  • Each of the power rollers has a spherical convex surface, and is sandwiched between the input side disk and the output side disk in a state of being supported by the trone.
  • Limiting means are provided.
  • each of these trons is extended by the swing limiting means provided between each of the swing frames and each of the trons. Therefore, it is possible to prevent the power rollers supported by the respective trons from being inclined excessively. That is, in the state where each of these power rollers is greatly inclined (the transmission gear ratio of the toroidal type continuously variable transmission is greatly deviated from 1), the transmission gear ratio exceeds the predetermined value and converges to the predetermined value. Even if the overshoot tends to occur, the trunnions that support the power rollers are prevented from excessively swinging by the swing limiter.
  • the contact ellipse formed at the rolling contact portion (traction portion) between the peripheral surface of each power roller supported by each trunnion and the inner surface of each disc is the disc of each disc. It is possible to ensure the durability of each power roller and each disk as well as riding on the edge.
  • FIG. 1 is a cross-sectional view of a main part showing Embodiment 1 of the present invention.
  • FIG. 2 A view taken along arrow A with the portion omitted.
  • FIG. 3 Stow-back member, (A) with the surface facing the end surface of the trunnion facing upward, (B) with the end The perspective view which each shows the surface facing the inner surface of a board on the upper side.
  • ⁇ 4 A view similar to FIG. 2, showing Embodiment 2 of the present invention.
  • FIG. 6 is a cross-sectional view taken along the line BB in FIG.
  • the swing limiting means is constituted by a convex portion and a concave portion.
  • These convex portions and concave portions are respectively provided on the end surfaces of the pivots provided at both ends of each troon and the inner surfaces of the swing frames facing the respective end surfaces (the end surfaces of the pivot and the inner surfaces of the swing frames). It does not matter which of the projections or depressions is provided).
  • the convex portion is combined with the concave portion in such a manner that the displacement (displacement relative to the swing direction of each of these trons) can be inserted.
  • the side surfaces of the convex portions and the inner surface of the concave portions are brought into contact with each other based on the swinging of the trons, thereby preventing the trunnions from swinging more than a predetermined amount.
  • resistance between the side surface of the convex portion and the inner surface of the concave portion is a resistance to the swing of the trunnion.
  • Resistance means in other words, resistance means (damper means) for applying a damping force (damping force) to the above-described trunnion is provided.
  • the lubricating oil introduced into the space constituted by the side surface of the convex portion and the inner surface of the concave portion is removed from this space based on the displacement of the convex portion. It shall have a configuration for entering and exiting.
  • the resistance means is configured by sandwiching an elastic member between the side surface of the convex portion and the inner surface of the concave portion facing each other.
  • FIGS. 1 to 3 show Embodiment 1 of the present invention corresponding to claims 1 to 4.
  • FIG. The feature of the present invention is that the (first and second) power rollers 4 (7) supported by the (first and second) trunnions 30 (31) are prevented from being inclined excessively.
  • the first and second) are to ensure the durability of the power rollers 4 (7) and (first and second) the input side and output side disks 2, 5, 3, 6 (see FIG. 5). Since the structure and operation of the other parts are the same as those of the conventional structure shown in FIGS. 5 to 8, the overlapping illustrations and explanations are omitted or simplified, and the structure of the parts shown in FIGS. The operation will be described. In the following explanation, “first” and “second” of the first and second members indicating that the cavities are different will be omitted.
  • Each swing frame 21 (22) is supported by the support frame 23 (24) via the support shaft 34 (see FIGS. 5 to 8).
  • the end plates 48, 48 are connected and fixed by screws 49, 49.
  • the pivots 33 and 33 provided on the shaft are supported only in a swinging manner in a state where axial displacement is prevented. For this reason, in the case of the present embodiment, between the inner peripheral surface of each of the circular holes 51 and 51 and the outer peripheral surface of each of the pivot shafts 33 and 33, the radial-one dollar bearing 52, 52 and the thrust-one dollar bearing. 53 and 53 are provided.
  • needle bearings 52 and 53 In order to arrange these needle bearings 52 and 53 concentrically, they are fitted and fixed to the outer peripheral surfaces of the outer rings 54 and 54 of the needle bearings 52 and 53 and the circular holes 51 and 51, respectively.
  • the inner circumferential surfaces of the spacers 55 and 55 are spherically fitted.
  • the both needle bearings 52, 53 are arranged between the outer rings 54, 54, which are aligned in this way, and the inner rings 76, 76 fitted on the outer peripheral surfaces of the pivots 33, 33.
  • Each is composed of several dollars.
  • each trunnion 30 (31) is supported in an intermediate manner between each trunnion 30 (31), which is supported by the respective swing frames 21 (22) so that only the swing displacement about the pivots 33 and 33 is freely supported.
  • the base half portion of the displacement shaft 32a is supported on the portion so as to be swingable and displaceable.
  • each of these traons 30 (31) A circular hole 56 is formed in an intermediate portion of the trunnion 30 (31) so as to penetrate both inner and outer peripheral surfaces.
  • Each of the circular holes 56 has a stepped shape in which a large-diameter portion 57 on the inner surface side and a small-diameter portion 58 on the outer surface side of each of the above-described trolons 30 (31) are continuously connected by a step portion 59.
  • the displacement shaft 32a formed integrally with the outer ring 61 constituting the angiular thrust ball bearing 60 is rotatably supported by the radial-dollar bearing 62 in such a circular hole 56.
  • a thrust needle bearing 63 is provided between the outer side surface of the outer ring 61 and the inner side surface of each of the truons 30 (31), and the outer ring 61 and the power inlet 4 around the displacement shaft 32a.
  • the displacement of (7) can be performed smoothly.
  • the thrust roller bearing 60 and another radial-single bearing 64 support the power roller 4 (7) rotatably around the front half of the displacement shaft 32a.
  • each trunnion 30 (31) swings more than a predetermined amount between each swing frame 21 (22) and each trunnon 30 (31).
  • Oscillation limiting means 65, 65 are provided to prevent this.
  • each of the swing restricting means 65, 65 is constituted by a pair of convex portions 66, 66 and a pair of concave portions 67, 67, respectively. That is, on the inner side surfaces of the end plates 48 and 48 coupled and fixed to both ends of the swing frames 21 (22), the pivots 33 and 33 provided on both ends of the trone 30 (31) are provided.
  • a bottomed concave hole 68, 68 is provided in a portion facing the end surface of the base plate in a state where the inner surface force is also recessed.
  • the concave portions 67 and 67 each having a fan-like opening are provided at two positions on the opposite sides in the radial direction of the concave holes 68 and 68, respectively.
  • the partition members 69 and 69 are fitted in the respective recessed hole portions 68 and 68 in a state in which the rotation in the respective recessed portions 68 and 68 is prevented.
  • the respective recesses 67 and 67 are constituted by the portions surrounded by the side surfaces of the members 69 and 69 and the inner surfaces (inner peripheral surface and bottom surface) of the recessed hole portions 68 and 68.
  • the partition members 69 and 69 are displaced in the circumferential direction of the recessed hole portions 68 and 68 in a state where they are engaged with the engaging recessed portions 70 and 70 provided on the bottom surfaces of the recessed hole portions 68 and 68. Is prevented.
  • the outer peripheral surfaces of the partition members 69 and 69 are fitted into the inner peripheral surfaces of the concave holes 68 and 68, so that the partition members 69 and 69 are in the radial direction of the concave holes 68 and 68. Is prevented from displacement.
  • cooling and lubrication of the thrust ball bearing 60 and the radial-dollar bearings 62 and 64 are provided at the center of the partition members 68 and 68.
  • a first oil passage 71 is provided to supply the lubricating oil to the required part, and the lubricating oil is supplied and discharged into the recesses 67 and 67 on the radially outer side of the first oil passage 71.
  • Second oil passages 72, 72 are provided for this purpose.
  • the recessed holes 68, 68 provided on the inner surfaces of the end plates 48, 48 at the end surfaces of the pivots 33, 33 provided at both ends of the respective trone 30 (31).
  • An annular stopper member 73 is fixed at a position opposite to. As shown in detail in FIG. 3, the stopper member 73 projects the convex portions 66, 66 and the locking convex portions 75, 75 on both side surfaces in the axial direction of the disc portion 74 from the respective side surfaces in the axial direction. Each is provided in a state.
  • Each of the convex portions 66, 66 is a radially outward portion of one side surface of the disk portion 74 (the lower side surface of Fig.
  • the stopper member 73 is locked to each of the trough-on by locking the locking protrusions 75, 75 into locking recesses (not shown) formed on the end surfaces of the pivots 33, 33. It is fixed to both ends of the 30 (31) in a state in which relative rotation with respect to this Trion 30 (31) is prevented. In this state, the convex portions 66 and 66 are inserted into the concave portions 67 and 67 so as to be able to be displaced in the swing direction of the trunnions 30 (31).
  • the side surfaces of the projections 66 and 66 come into contact with the side surfaces of the partition members 69 and 69 on the inner surfaces of the recesses 67 and 67 based on the swing of each of the trolons 30 (31). This prevents each of these TR-ONs 30 (31) from swinging more than a predetermined amount.
  • the protrusions 66, 66 are inserted into the recesses 67, 67, and the displacement of the trol-on 30 (31) in the swinging direction is changed. As long as the side surface does not abut against the inner surface of the recesses 67, 67, it is allowed.
  • the side surfaces of the convex portions 66 and 66 are abutted on the basis of the distance between the side surfaces of the convex portions 66 and 66 and the inner surface of the concave portions 67 and 67 based on the swing of the trunnions 30 (31).
  • each of these trunnions 30 (31) and eventually each of these trunnions 30 (31) The inclination angle of each of the supported power rollers 4 (7) can be regulated within a desired range.
  • the swing limiting means 65, 65 provided between each swing frame 21 (22) and each trol-on 30 (31), that is, Due to the convex portions 66 and 66 and the concave portions 67 and 67, the respective trolons 30 (31) and the respective power rollers 4 (7) supported by the respective truons 30 (31) are excessively inclined. Can be prevented.
  • the predetermined ratio is exceeded after the transmission ratio exceeds a predetermined value.
  • the trunnion 30 (31) that supports the power rollers 4 (7) has the side surfaces of the convex portions 66, 66 on the side surfaces of the concave portions 67, 67.
  • the partition members 69 and 69 which are the inner surfaces of the inner surface, further swinging is prevented. Therefore, the rolling contact portion between the peripheral surface of each of the power rollers 4 (7) supported by each of the trons 30 (31) and the inner surface of each of the input side and output side disks 2, 5 (3, 6).
  • the contact ellipse formed in the (traction part) does not run on the edge of each of these disks 2, 5 (3, 6).
  • Each of these power rollers 4 (7) and each disk 2, 5 (3, 6) Durability.
  • the power rollers 4 ( Each trunnion 30 (31) supporting 7) is prevented from excessively swinging based on the force. For this reason, such hunting is less likely to occur, and it is possible to prevent a decrease in transmission efficiency, an increase in vibration, and a decrease in running stability.
  • the force (damping force, damping force) applied to each trol-on 30 (31) via the respective convex portions 66, 66 is the same as that of the second oil passages 72, 72.
  • the desired values can be regulated.
  • FIG. 4 shows a second embodiment of the present invention corresponding to claims 1 to 3 and 5.
  • the side surfaces of the convex portions 66, 66 provided on the stopper member 73 and the concave portions 67, 67 provided on the end plate 48 constituting the swing frame 21 (see FIG. 1).
  • resistance means is provided that provides resistance to the swinging of the trolley 30 (see FIG. 1).
  • the lubricating oil is placed in the space formed by the side surfaces of the convex portions 66 and 66 and the inner surfaces of the concave portions 67 and 67. not filled.
  • the second oil passages 72 and 72 are not provided in the cutting member 69 constituting the recesses 67 and 67.
  • Other configurations and operations are the same as those of the first embodiment described above, and thus redundant description is omitted.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Friction Gearing (AREA)

Abstract

[PROBLEMS] To prevent a power roller [(4(7)] from being excessively inclined. [MEANS FOR SOLVING PROBLEMS] Stop members (73, 73) fixed to opposite ends of trunnions [(30 (31)] are provided with convex sections (66, 66). Further, the inner surfaces of end plates (48, 48) constituting a swing frame [(21 (22)] are provided with concave sections (67, 67) at positions opposed to the convex sections (66, 66). The convex sections (66, 66) are inserted in the concave sections (67, 67) in such a manner as to allow the trunnions [(30) (31)] to displace in the direction of swing. Further, the lateral surfaces of the convex sections (66, 66) abut against the inner surfaces of the concave sections (67, 67) on the basis of the swing of the trunnions [(30) (31)], thereby preventing the trunnions [(30) (31)] from swinging more than a predetermined degree.

Description

明 細 書  Specification
トロイダル型無段変速機  Toroidal continuously variable transmission
技術分野  Technical field
[0001] この発明に係るトロイダル型無段変速機は、例えば車両(自動車)用の自動変速装 置を構成する変速ユニットとして利用する。  The toroidal continuously variable transmission according to the present invention is used as a transmission unit that constitutes an automatic transmission device for a vehicle (automobile), for example.
背景技術  Background art
[0002] 自動車用の変速機としてトロイダル型無段変速機が研究され、一部で実施されてい る力 乗用車用としては大型で大きなトルクを発生するエンジンを組み込んだ四輪駆 動車用の自動変速装置の変速ユニットとして好適な構造が、例えば特許文献 1に記 載されて従来カゝら知られている。図 5〜8は、この特許文献 1に記載された、大排気量 の四輪駆動車用のトロイダル型無段変速機を示している。このトロイダル型無段変速 機 1は、第一入力側ディスク 2と第一出力側ディスク 3との間に 3個の第一パワーロー ラ 4、 4を、第二入力側ディスク 5と第二出力側ディスク 6との間に 3個の第二パワー口 ーラ 7を、それぞれ設けて、合計 6個のパワーローラ 4、 7により、動力の伝達を行なう 様に構成している。  [0002] Toroidal-type continuously variable transmissions have been studied as transmissions for automobiles, and are being implemented in part. Automatic transmissions for four-wheel drive vehicles incorporating large-sized engines that generate large torque for passenger cars A structure suitable as a transmission unit of the apparatus is described in, for example, Patent Document 1 and is conventionally known. FIGS. 5 to 8 show a toroidal continuously variable transmission for a four-wheel drive vehicle with a large displacement described in Patent Document 1. FIG. This toroidal continuously variable transmission 1 includes three first power rollers 4 and 4 between a first input disk 2 and a first output disk 3, and a second input disk 5 and a second output. Three second power rollers 7 are respectively provided between the side disk 6 and a total of six power rollers 4 and 7 transmit power.
[0003] 上記自動変速装置を構成する為、動力の伝達方向に関して最も前段部には、発進 クラッチであるトルクコンバータ 8を設け、このトルクコンバータ 8の出力部に、上記トロ イダル型無段変速機 1を構成する入力軸 9の前半部 9aを組み込んで 、る。図示しな い走行用エンジンの回転に伴ってこの前半部 9aは、上記トルクコンバータ 8により回 転駆動される。そして、この前半部 9aの後端部に上記入力軸 9の後半部 9bを、互い に同心に且つ相対回転自在に支持して 、る。  [0003] In order to configure the automatic transmission, a torque converter 8 that is a starting clutch is provided at the most front stage in the power transmission direction, and the toroidal-type continuously variable transmission is provided at the output of the torque converter 8. Incorporate the first half 9a of the input shaft 9 constituting 1. The front half 9a is driven to rotate by the torque converter 8 as the traveling engine (not shown) rotates. The rear half 9b of the input shaft 9 is supported on the rear end of the front half 9a so as to be concentric with each other and relatively rotatable.
[0004] そして、上記前半部 9aと後半部 9bとの間に、前進と後退とを切り換える為の前後進 切り換えユニット 10を、動力の伝達方向に関して直列に設けている。遊星歯車機構 である、この前後進切り換えユニット 10は、それぞれが湿式多板クラッチである前進 用クラッチ 11と後退用クラッチ 12とを選択して断接させる事により、前進状態と後退 状態とを切り換える。  [0004] A forward / reverse switching unit 10 for switching between forward and backward movement is provided in series between the front half portion 9a and the rear half portion 9b in the power transmission direction. This forward / reverse switching unit 10, which is a planetary gear mechanism, switches between a forward state and a reverse state by selecting and connecting a forward clutch 11 and a reverse clutch 12, each of which is a wet multi-plate clutch. .
[0005] 動力の伝達方向に関して、上述の様な前後進切り換えユニット 10の後側に、上記ト ロイダル型無段変速機 1を設けている。そして、このトロイダル型無段変速機 1の入力 部、即ち、上記前後進切り換えユニット 10の出力部につながる部分と、出力部、即ち 、前輪用駆動軸 13及び後輪用駆動軸 14につながる部分との間の変速比を連続的 に変化させる様にしている。このトロイダル型無段変速機 1は、上記後半部 9bの周囲 に設けている。即ち、この後半部 9bの前後両端部近傍に第一、第二両入力側ディス ク 2、 5を、それぞれが断面円弧状の凹面である内側面同士を対向させた状態で、互 いに同心に且つ互いに同期した回転自在に支持している。この為に図示の例では、 前側(図 5の左側)に設けた第一入力側ディスク 2を、前記前後進切り換えユニット 10 を構成するキャリア 15の基端部にスプライン係合させると共に、前側への移動を阻止 している。これに対して、後側(図 5の右側)に設けた第二入力側ディスク 5は、上記後 半部 9bの後端部に、ボールスプライン 16を介して支持している。そして、油圧式の口 ーデイング装置 17により、上記第二入力側ディスク 5を上記第一入力側ディスク 2に 向け、押圧自在としている。 [0005] With regard to the direction of power transmission, the above-described forward / reverse switching unit 10 has a A toroidal continuously variable transmission 1 is provided. The toroidal continuously variable transmission 1 has an input portion connected to the output portion of the forward / reverse switching unit 10 and an output portion, that is, a portion connected to the front wheel drive shaft 13 and the rear wheel drive shaft 14. The gear ratio between is continuously changed. The toroidal continuously variable transmission 1 is provided around the latter half 9b. That is, the first and second input side disks 2 and 5 are concentric with each other in the state where the inner side surfaces, which are concave surfaces each having an arcuate cross section, face each other in the vicinity of both front and rear end portions of the latter half portion 9b. And rotatably supported in synchronization with each other. For this purpose, in the example shown in the figure, the first input side disk 2 provided on the front side (left side in FIG. 5) is spline-engaged with the base end portion of the carrier 15 constituting the forward / reverse switching unit 10 and also moved forward. Is blocked. On the other hand, the second input side disk 5 provided on the rear side (right side in FIG. 5) is supported on the rear end portion of the rear half portion 9b via the ball spline 16. Then, the second input disk 5 is pressed toward the first input disk 2 by a hydraulic opening device 17 so as to be freely pressed.
[0006] 又、前記後半部 9bの中間部周囲には支持筒 18を、この後半部 9bと同心に設けて いる。この支持筒 18は、ステー 19、 19の内径側端部により、その両端部を支持固定 している。尚、これら各ステー 19、 19は、後述する支持環 20、 20にそれぞれの外径 側端部を支持固定して、やはり後述する第一、第二各揺動フレーム 21、 22を揺動自 在に支持する為の、第一、第二各支持フレーム 23、 24を構成する。又、上記支持筒 18の内側に上記後半部 9bを、この支持筒 18の周囲に前記第一、第二両出力側デ イスク 3、 6を、それぞれ回転及び軸方向の変位自在に支持している。又、これら両出 力側ディスク 3、 6は、間に設けたスラスト軸受により、互いの間に加わるアキシアル荷 重を支承しつつ、互いの相対回転を自在としている。  [0006] Further, a support cylinder 18 is provided concentrically with the latter half 9b around the middle part of the latter half 9b. The support cylinder 18 is supported and fixed at both ends by the inner diameter side ends of the stays 19 and 19. These stays 19 and 19 support and fix their outer diameter side ends to support rings 20 and 20 described later, respectively, and first and second swing frames 21 and 22 described later also swing themselves. The first and second support frames 23 and 24 are configured to support each other. The latter half 9b is supported inside the support cylinder 18, and the first and second output side disks 3 and 6 are supported around the support cylinder 18 so as to be freely rotatable and axially displaceable. Yes. Further, these output side disks 3 and 6 can freely rotate relative to each other while supporting the axial load applied between them by a thrust bearing provided therebetween.
[0007] 又、上記第一出力側ディスク 3の外側面側には前輪用出力歯車 25を固定し、この 前輪用出力歯車 25と前記前輪用駆動軸 13とを、前輪用従動歯車 26を介して係合さ せ、上記第一出力側ディスク 3により上記前輪用駆動軸 13を回転駆動自在としてい る。又、この前輪用駆動軸 13の回転を、前輪用デフアレンシャルギヤ 27を介して、図 示しない前輪に伝達自在としている。一方、上記第二出力側ディスク 6の外側面側に は後輪用出力歯車 28を固定し、この後輪用出力歯車 28と前記後輪用駆動軸 14とを 、後輪用従動歯車 29を介して係合させ、上記第二出力側ディスク 6により上記後輪 用駆動軸 14を回転駆動自在としている。又、この後輪用駆動軸 14の回転を、図示し な 、後輪用デフアレンシャルギヤを介して、やはり図示しな 、後輪に伝達自在として いる。 [0007] Further, a front wheel output gear 25 is fixed to the outer surface side of the first output side disk 3, and the front wheel output gear 25 and the front wheel drive shaft 13 are connected via a front wheel driven gear 26. The front output shaft 13 can be driven to rotate by the first output side disk 3. Further, the rotation of the front wheel drive shaft 13 can be transmitted to a front wheel (not shown) via a front wheel differential gear 27. On the other hand, a rear wheel output gear 28 is fixed to the outer surface side of the second output side disk 6, and the rear wheel output gear 28 and the rear wheel drive shaft 14 are connected to each other. The rear wheel driven shaft 29 is engaged, and the second output side disk 6 allows the rear wheel drive shaft 14 to be rotationally driven. The rotation of the rear wheel drive shaft 14 can be transmitted to the rear wheels via a rear wheel differential gear (not shown).
[0008] 又、前記第一入力側ディスク 2の内側面と上記第一出力側ディスク 3の内側面との 間には前記 3個の第一パワーローラ 4、 4を、前記第二入力側ディスク 5の内側面と上 記第二出力側ディスク 6の内側面との間には前記 3個の第二パワーローラ 7を、それ ぞれ挟持している。これら第一、第二各パワーローラ 4、 7は、それぞれ第一、第二各 トラ-オン 30、 31の内側面で、この内側面力 突出した状態で設けられた各変位軸 32、 32の周囲に回転自在に支持している。これら第一、第二各トラ-オン 30、 31は 、それぞれの両端部に互いに同心に設けた、上記各ディスク 2、 5、 3、 6の中心軸と 交差する事はないが、これら各ディスク 2、 5、 3、 6の中心軸の方向に対して直角若し くは直角に近い方向となる捻れの位置に存在する、第一、第二各枢軸 33 (第二枢軸 は図示せず)を中心に揺動する。又、上記第一、第二各トラ-オン 30、 31は、それぞ れ第一、第二各揺動フレーム 21、 22の両端部に、揺動変位自在に支持している。  [0008] In addition, the three first power rollers 4, 4 are provided between the inner side surface of the first input side disc 2 and the inner side surface of the first output side disc 3, and the second input side disc. The three second power rollers 7 are sandwiched between the inner surface of 5 and the inner surface of the second output side disk 6. The first and second power rollers 4 and 7 are respectively provided on the inner surfaces of the first and second trolleys 30 and 31, respectively, with the displacement shafts 32 and 32 provided in a state where the inner surface force protrudes. It is supported so that it can rotate freely. These first and second traons 30 and 31 do not intersect the central axes of the disks 2, 5, 3, and 6 provided concentrically with each other at both ends. First and second pivots 33 (second pivots not shown) present at twisted positions at right angles to or near right angles to the directions of the central axes of 2, 5, 3, 6 Rocks around the center. The first and second troons 30 and 31 are supported at both ends of the first and second swing frames 21 and 22 so as to be swingably displaceable.
[0009] そして、上記第一、第二各揺動フレーム 21、 22の中間部を前記第一、第二各支持 フレーム 23、 24を構成する前記各支持環 20、 20同士の間に、各ディスク 2、 5、 3、 6 の中心軸に対し平行若しくは平行に近い方向に設けられた支持軸 34、 34を中心と する揺動変位自在に支持している。上記第一、第二各支持フレーム 23、 24は、互い に平行に配置されたそれぞれ 1対ずつの支持環 20、 20を、前記ステー 19を構成す る 3本の支柱部 35、 35の外径側端部を介して互いに結合して成る。上記各支持軸 3 4、 34は、上記各支持環 20、 20の円周方向に関して、上記各支柱部 35、 35の中間 位置で、上記第一、第二各支持フレーム 23、 24を構成する 1対ずつの支持環 20、 2 0同士の間に掛け渡している。従って、上記第一、第二各揺動フレーム 21、 22は、円 周方向に隣り合う支柱部 35、 35同士の間に、揺動自在に支持されている。  [0009] And, between the support rings 20, 20 constituting the first and second support frames 23, 24 between the first and second swing frames 21, 22, respectively, The disk 2, 5, 3, 6 is supported so as to be swingable and displaceable about a support shaft 34, 34 provided in a direction parallel or nearly parallel to the central axis of the disk 2, 5, 3, 6. Each of the first and second support frames 23 and 24 has a pair of support rings 20 and 20 arranged in parallel to each other, outside the three support portions 35 and 35 constituting the stay 19. They are connected to each other through the radial end. The support shafts 34 and 34 constitute the first and second support frames 23 and 24 at intermediate positions of the support columns 35 and 35 in the circumferential direction of the support rings 20 and 20, respectively. A pair of support rings 20 and 20 are spanned between each other. Accordingly, the first and second swing frames 21 and 22 are swingably supported between the column portions 35 and 35 adjacent to each other in the circumferential direction.
[0010] 更に、上記第一、第二各揺動フレーム 21、 22を、これら各揺動フレーム 21、 22の 両端部と上記各支持環 20、 20との間に設けた油圧シリンダ 36a、 36bにより、揺動変 位自在としている。これら各油圧シリンダ 36a、 36bは、それぞれ上記各支持環 20、 2 0の一部で上記各揺動フレーム 21、 22の両端部に整合する位置に設けている。一 方、上記第一、第二各揺動フレーム 21、 22の両端部で、上記各油圧シリンダ 36a、 3 6bに整合する部分にはロッド 37a、 37bを、上記各支持軸 34、 34と平行に、上記第 一、第二各揺動フレーム 21、 22の両端部を貫通する状態で支持固定している。そし て、上記各油圧シリンダ 36a、 36bに嵌装したビス卜ン 38a、 38bと、上記各ロッド 37a 、 37bとを係合させている。変速時には、上記各揺動フレーム 21、 22毎に 2対ずつ( 各揺動フレーム毎に 4個ずつ、トロイダル型無段変速機 1全体として合計 24個)設け た油圧シリンダ 36a、 36bのうちの、上記各揺動フレーム 21、 22の長さ方向一端側に 設けた一方の油圧シリンダ 36a (36b)を伸長させると共に他方の油圧シリンダ 36b (3 6a)を収縮させて、上記各揺動フレーム 21、 22を所定方向に所定量だけ揺動変位さ せる。 Furthermore, the first and second swing frames 21 and 22 are provided with hydraulic cylinders 36a and 36b provided between both ends of the swing frames 21 and 22 and the support rings 20 and 20, respectively. This makes it possible to swing and displace freely. These hydraulic cylinders 36a and 36b are respectively connected to the support rings 20 and 2 respectively. A part of 0 is provided at a position aligned with both end portions of the swing frames 21 and 22. On the other hand, rods 37a and 37b are arranged in parallel with the support shafts 34 and 34 at the ends of the first and second swing frames 21 and 22 that are aligned with the hydraulic cylinders 36a and 36b. In addition, the first and second swing frames 21 and 22 are supported and fixed so as to penetrate both end portions. The screws 38a and 38b fitted in the hydraulic cylinders 36a and 36b are engaged with the rods 37a and 37b. During shifting, two pairs of each of the swing frames 21 and 22 (four for each swing frame, a total of 24 toroidal-type continuously variable transmissions 1 as a whole) of the hydraulic cylinders 36a and 36b Then, the one hydraulic cylinder 36a (36b) provided on one end side in the longitudinal direction of each of the swing frames 21 and 22 is extended and the other hydraulic cylinder 36b (36a) is contracted, so that each of the swing frames 21 and 22 is retracted. , 22 is displaced by a predetermined amount in a predetermined direction.
[0011] 又、上記各油圧シリンダ 36a、 36bへの圧油の給排を制御する為の制御弁 39は、 前記各支持環 20、 20に支持している。上記各油圧シリンダ 36a、 36bへの圧油の給 排により上記各揺動フレーム 21、 22が揺動変位すると、これら各揺動フレーム 21、 2 2に支持したトラ-オン 30、 31の外側面に設けたカム面 40が、上記制御弁 39に付 属のプランジャ 41を介してこの制御弁 39のスプール 42を変位させ、上記制御弁 39 の切り換えを行なう。このスプール 42と共にこの制御弁 39を構成するスリーブ 43は、 変速時には所望の変速比を実現できる様に、制御モータ 44により、所定位置に変位 させておく。この様な制御弁 39及び制御モータ 44は、前記第一入力側ディスク 2及 び第一出力側ディスク 3を含んで構成する第一キヤビティ 45側に 1個、前記第二入力 側  [0011] Further, a control valve 39 for controlling supply and discharge of pressure oil to and from the hydraulic cylinders 36a and 36b is supported by the support rings 20 and 20, respectively. When the swing frames 21 and 22 are swung and displaced by the supply and discharge of pressure oil to the hydraulic cylinders 36a and 36b, the outer surfaces of the trolons 30 and 31 supported by the swing frames 21 and 22 The cam face 40 provided on the control valve 39 displaces the spool 42 of the control valve 39 via the plunger 41 attached to the control valve 39 to switch the control valve 39. The sleeve 43 that constitutes the control valve 39 together with the spool 42 is displaced to a predetermined position by the control motor 44 so that a desired gear ratio can be realized at the time of shifting. Such a control valve 39 and a control motor 44 are provided on the first input side disk 2 and the first output side disk 3, and one on the second input side.
ディスク 5及び第二出力側ディスク 6を含んで構成する第二キヤビティ 46側に 1個、ト ロイダル型無段変速機 1全体で 2個設けている。そして、第一キヤビティ 45側の制御 モータ 44によりこの第一キヤビティ 45側の制御弁 39を、第二キヤビティ 46側の制御 モータ 44によりこの第二キヤビティ 46側の制御弁 39を、マイクロコンピュータを内蔵 した図示しない制御器力もの指令信号に基づき、互いに同期して (直進状態の場合) 、或は互いに独立して (旋回状態の場合)制御する。  One on the second cavity 46 side, which includes the disk 5 and the second output side disk 6, and two toroidal-type continuously variable transmissions 1 as a whole. A control motor 39 on the first cavity 45 side is provided with the control valve 39 on the first cavity 45 side, and a control valve 39 on the second cavity 46 side is provided on the control motor 44 on the second cavity 46 side. Based on the command signal of the controller force (not shown), the control is performed in synchronization with each other (in a straight traveling state) or independently of each other (in a turning state).
[0012] この様に構成する為、変速時には、上記各油圧シリンダ 36a、 36bへの圧油の給排 に基づき、上記第一、第二各揺動フレーム 21、 22が、前記各支持軸 34、 34を中心 に、所定方向に所定量だけ揺動変位する。この結果、これら各揺動フレーム 21、 22 に支持された上記第一、第二各トラ-オン 30、 31が、上記各支持軸 34、 34を中心と して円弧運動 (スィベル運動)をする。そして、この円弧運動に基づく上記第一、第二 各トラ-オン 30、 31の上記第一、第二枢軸 33の軸方向に関する変位により、前記各 パワーローラ 4、 7の周面と上記各ディスク 2、 5、 3、 6の内側面との転がり接触部(トラ クシヨン部)に作用する、接線方向の力の向きが変化する。そして、この力の向きの変 化に伴って上記第一、第二各トラニオン 30、 31が、上記第一、第二各揺動フレーム 21、 22に枢支された第一、第二各枢軸 33を中心として、互いに逆方向に揺動し、上 記第一、第二各パワーローラ 4、 7の周面と上記各内側面との当接位置が変化して、 第一、第二各入力側ディスク 2、 5と第一、第二各出力側ディスク 3、 6との間の回転速 度比が変化する。 [0012] Because of such a configuration, when shifting, pressure oil is supplied to and discharged from the hydraulic cylinders 36a and 36b. Accordingly, the first and second swing frames 21 and 22 are swung and displaced by a predetermined amount in a predetermined direction around the support shafts 34 and 34, respectively. As a result, the first and second trolons 30 and 31 supported by the swing frames 21 and 22 perform an arc motion (swivel motion) around the support shafts 34 and 34, respectively. . Then, due to the displacement in the axial direction of the first and second pivots 33 of the first and second troons 30 and 31 based on the arc motion, the peripheral surfaces of the power rollers 4 and 7 and the disks The direction of the tangential force acting on the rolling contact part (traction part) with the inner surface of 2, 5, 3, 6 changes. As the force changes, the first and second trunnions 30 and 31 are pivotally supported by the first and second swing frames 21 and 22, respectively. Around the center 33 and swinging in opposite directions, the contact position between the peripheral surfaces of the first and second power rollers 4 and 7 and the inner surfaces changes, and the first and second The rotational speed ratio between the input side disks 2 and 5 and the first and second output side disks 3 and 6 changes.
[0013] 上述の様に構成する従来のトロイダル型無段変速機 1の運転時には、前記入力軸 9の後半部 9bと共に互いに同期して回転する第一、第二両入力側ディスク 2、 5のう ち、第一入力側ディスク 2から上記各第一パワーローラ 4、 4を介して前記第一出力側 ディスク 3に伝わった動力により、前記前輪用駆動軸 13を回転駆動する。又、第二入 力側ディスク 5から上記各第二パワーローラ 7を介して前記第二出力側ディスク 6に伝 わった動力により、後輪用駆動軸 14を回転駆動する。  [0013] During the operation of the conventional toroidal-type continuously variable transmission 1 configured as described above, the first and second input side disks 2 and 5 that rotate in synchronization with the latter half 9b of the input shaft 9 The front wheel drive shaft 13 is rotationally driven by the power transmitted from the first input disk 2 to the first output disk 3 via the first power rollers 4 and 4. The rear wheel drive shaft 14 is driven to rotate by the power transmitted from the second input disk 5 to the second output disk 6 via the second power rollers 7.
[0014] ところで、上述の様なトロイダル型無段変速機の場合、このトロイダル型無段変速機 を通過するトルクが急変動する際や変速比が急激に変動する際等に、この変速比が 所定の値を行き過ぎて力 所定の値に収束していくオーバーシュートを生じる可能性 がある。そして、この様なオーバーシュートが、第一、第二各パワーローラ 4、 7が大き く傾斜して!/、る状態 (トロイダル型無段変速機の変速比が 1から大きく外れた状態)で 生じると、これら各パワーローラ 4、 7が過度に傾斜し、これら各パワーローラ 4、 7の周 面が第一、第二入力側、出力側各ディスク 2、 5、 3、 6の端縁に達し易くなる可能性が ある。即ち、上記各パワーローラ 4、 7の周面と上記各ディスク 2、 5、 3、 6の内側面と の転がり接触部(トラクシヨン部)に形成される接触楕円が、これら各ディスク 2、 5、 3、 6の端縁に乗り上げ易くなり、これら各パワーローラ 4、 7並びに各ディスク 2、 5、 3、 6 にエッジロードに基づく損傷を生じ易くなる。この様な損傷は、これら各パワーローラ 4 、 7や各ディスク 2、 5、 3、 6の耐久性を低下させる等、好ましくない。 By the way, in the case of the toroidal type continuously variable transmission as described above, when the torque passing through the toroidal type continuously variable transmission changes suddenly or when the gear ratio changes rapidly, the transmission ratio is There is a possibility that an overshoot will occur that causes the force to converge to a predetermined value by going over a predetermined value. Such overshoot is caused when the first and second power rollers 4 and 7 are greatly tilted! / (When the gear ratio of the toroidal continuously variable transmission is significantly different from 1). When this occurs, the power rollers 4 and 7 are excessively inclined, and the surfaces of the power rollers 4 and 7 are aligned with the edges of the first, second input and output side disks 2, 5, 3, and 6, respectively. May be easier to reach. That is, a contact ellipse formed on a rolling contact portion (traction portion) between the peripheral surface of each of the power rollers 4 and 7 and the inner surface of each of the disks 2, 5, 3, 6 is the disc 2, 5, It becomes easy to ride on the edge of 3 and 6, and each of these power rollers 4 and 7 and each disk 2, 5, 3, 6 It becomes easy to cause damage based on edge load. Such damage is undesirable because it reduces the durability of each of the power rollers 4 and 7 and the disks 2, 5, 3, and 6.
[0015] 例えば、特許文献 2に記載されている様に、パワーローラを支持するトラ-オンをケ 一シングに支持した支持板に支持する構造の場合には、この支持板等にこのトラ- オンが過度に揺動するのを制限する為の衝合部材を設ける事で、このトラ-オン延ぃ てはこのトラ-オンに支持した上記パワーローラが過度に傾斜する事を防止できる。 但し、前述の図 5〜8に示した様な、第一、第二各トラ-オン 30、 31を第一、第二各 揺動フレーム 21、 22の両端部に揺動変位自在に支持した構造の場合には、上記特 許文献 2に記載された構造の様に各トラ-オンを支持板により支持するものではない 。又、上述の図 5〜8に示した構造の場合は、上述の様な衝合部材を設けるスペース が制限される等、上記特許文献 2に記載された構造をそのまま採用する事はできな い。 [0015] For example, as described in Patent Document 2, in the case of a structure in which a trunnion for supporting a power roller is supported by a support plate supported by a casing, the support plate or the like By providing an abutting member for restricting excessive swinging of the ON, it is possible to prevent the power roller supported by the TRORON and the TRORON from tilting excessively. However, as shown in FIGS. 5 to 8 described above, the first and second troons 30 and 31 are swingably supported at both ends of the first and second swing frames 21 and 22, respectively. In the case of a structure, unlike the structure described in Patent Document 2, each trauon is not supported by a support plate. In the case of the structure shown in FIGS. 5 to 8 described above, the structure described in Patent Document 2 cannot be employed as it is, for example, the space for providing the abutting member as described above is limited. .
[0016] 又、上述の様にトロイダル型無段変速機を通過するトルクが急変動する場合に、ォ 一バーシュートに伴って、変速比が所定の値に収束しなくなるハンチングを生じる可 能性もある。この様なハンチングは、伝達効率の低下や振動を増大させる他、ドライ バビリテイイ (走行安定性)を低下させる等、好ましくな 、。  [0016] Further, when the torque passing through the toroidal-type continuously variable transmission fluctuates as described above, hunting that causes the gear ratio to not converge to a predetermined value may occur with overshoot. There is also. Such hunting is preferable because it lowers transmission efficiency and increases vibration, as well as lowering driveability (running stability).
特許文献 1:特開 2001— 165262号公報  Patent Document 1: Japanese Patent Laid-Open No. 2001-165262
特許文献 2:実開平 6— 43404号公報  Patent Document 2: Japanese Utility Model Publication No. 6-43404
発明の開示  Disclosure of the invention
発明が解決しょうとする課題  Problems to be solved by the invention
[0017] 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、パワーローラが過 度に傾斜する事を防止し、優れた耐久性を有する構造を実現すべく発明したもので ある。 [0017] The toroidal continuously variable transmission of the present invention has been invented to realize a structure having excellent durability by preventing the power roller from being excessively inclined in view of the above-described circumstances. is there.
課題を解決するための手段  Means for solving the problem
[0018] 本発明のトロイダル型無段変速機は、入力側ディスク及び出力側ディスクと、複数 のトラ-オンと、複数のパワーローラとを備える。 [0018] A toroidal continuously variable transmission according to the present invention includes an input side disk and an output side disk, a plurality of trons, and a plurality of power rollers.
[0019] このうちの入力側ディスク及び出力側ディスクは、それぞれが断面円弧形の凹面で ある互いの内側面同士を対向させた状態で、互いに同心に、且つ互いに独立した回 転自在に支持されている。 Of these, the input-side disk and the output-side disk are concentric and independent of each other with their inner surfaces facing each other, which are concave surfaces having a circular arc cross section. It is supported to roll freely.
[0020] 又、上記各トラ-オンは、上記入力側ディスク及び出力側ディスクの中心軸に対し 捻れの位置にある枢軸を中心として揺動する。  [0020] Each of the trillions swings about a pivot that is twisted with respect to the central axes of the input and output disks.
[0021] 又、上記各パワーローラは、その周面を球状凸面としたもので、上記各トラ-オンに 支持された状態で上記入力側ディスク及び出力側ディスク同士の間に挟持されてい る。 [0021] Each of the power rollers has a spherical convex surface, and is sandwiched between the input side disk and the output side disk in a state of being supported by the trone.
[0022] そして、上記各トラ-オンの周囲に設けた支持フレームに、支持軸によりそれぞれ の中間部を枢支した、上記各トラ-オンと同数の揺動フレームを、ァクチユエータによ り揺動変位自在としている。又、これと共に、上記各トラ-オンの両端部に設けた上記 各枢軸を、上記各揺動フレームの両端部に揺動自在に支持している。  [0022] Then, the same number of swing frames as each of the above-mentioned troons, each of which is pivotally supported by a support shaft on a support frame provided around each troon, is swung by an actuator. Displaceable. At the same time, the pivots provided at both end portions of the respective troons are supported swingably at both end portions of the respective swing frames.
[0023] 特に、本発明のトロイダル型無段変速機に於いては、上記各揺動フレームと上記各 トラニオンとの間に、これら各トラニオンが所定以上揺動するのを阻止する為の揺動 制限手段を設けている。  In particular, in the toroidal type continuously variable transmission according to the present invention, the swing for preventing the trunnions from swinging more than a predetermined distance between the swing frames and the trunnions. Limiting means are provided.
発明の効果  The invention's effect
[0024] 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、各揺動フレーム と各トラ-オンとの間に設けた揺動制限手段により、これら各トラ-オン延いてはこれ ら各トラ-オンに支持した各パワーローラが過度に傾斜する事を防止できる。即ち、こ れら各パワーローラが大きく傾斜している状態(トロイダル型無段変速機の変速比が 1 から大きく外れた状態)で、変速比が所定の値を行き過ぎてから所定の値に収束する オーバーシュートが生じる傾向となったとしても、上記各パワーローラを支持した上記 各トラニオンは、上記揺動制限手段により過度に揺動するのを阻止される。この為、こ れら各トラ-オンに支持した上記各パワーローラの周面と各ディスクの内側面との転 力 Sり接触部(トラクシヨン部)に形成される接触楕円が、これら各ディスクの端縁に乗り 上げる事はなぐこれら各パワーローラ並びに各ディスクの耐久性を確保できる。 図面の簡単な説明  [0024] According to the toroidal continuously variable transmission of the present invention configured as described above, each of these trons is extended by the swing limiting means provided between each of the swing frames and each of the trons. Therefore, it is possible to prevent the power rollers supported by the respective trons from being inclined excessively. That is, in the state where each of these power rollers is greatly inclined (the transmission gear ratio of the toroidal type continuously variable transmission is greatly deviated from 1), the transmission gear ratio exceeds the predetermined value and converges to the predetermined value. Even if the overshoot tends to occur, the trunnions that support the power rollers are prevented from excessively swinging by the swing limiter. For this reason, the contact ellipse formed at the rolling contact portion (traction portion) between the peripheral surface of each power roller supported by each trunnion and the inner surface of each disc is the disc of each disc. It is possible to ensure the durability of each power roller and each disk as well as riding on the edge. Brief Description of Drawings
[0025] [図 1]本発明の実施例 1を示す要部断面図。 FIG. 1 is a cross-sectional view of a main part showing Embodiment 1 of the present invention.
[図 2]—部を省略して示す A矢視図。  [FIG. 2] A view taken along arrow A with the portion omitted.
[図 3]ストツバ部材を、(A)はトラニオンの端面に対向する面を上側にして、(B)は端 板の内側面に対向する面を上側にして、それぞれ示す斜視図。 [Fig. 3] Stow-back member, (A) with the surface facing the end surface of the trunnion facing upward, (B) with the end The perspective view which each shows the surface facing the inner surface of a board on the upper side.
圆 4]本発明の実施例 2を示す、図 2と同様の図。 圆 4] A view similar to FIG. 2, showing Embodiment 2 of the present invention.
圆 5]従来構造の 1例を示す断面図。 [5] Cross-sectional view showing an example of a conventional structure.
[図 6]図 5の B— B断面図。 FIG. 6 is a cross-sectional view taken along the line BB in FIG.
[図 7]同 C C断面図。 [Fig. 7] CC sectional view.
圆 8]図 7とほぼ同じ部分を、第一トラ-オンの両端部に設けた第一枢軸の中心軸 を含む平面で切断した状態で示す断面図。 [8] Sectional view showing a portion substantially the same as FIG. 7 cut along a plane including the central axis of the first pivot provided at both ends of the first trillion.
符号の説明 Explanation of symbols
1 トロイダル型無段変速機  1 Toroidal type continuously variable transmission
2 第一入力側ディスク  2 First input disk
3 第一出力側ディスク  3 First output disk
4 第一パワーローラ  4 First power roller
5 第二入力側ディスク  5 Second input disk
6 第二出力側ディスク  6 Second output disk
7 第二パワーローラ  7 Second power roller
8 トルクコンバータ  8 Torque converter
9 入力軸  9 Input shaft
9a 前半部  9a First half
9b 後半部  9b Second half
10 前後進切り換えユニット  10 Forward / reverse switching unit
11 前進用クラッチ  11 Forward clutch
12 後退用クラッチ  12 Reverse clutch
13 前輪用駆動軸  13 Front wheel drive shaft
14 後輪用駆動輪  14 Drive wheels for rear wheels
15 キャリア  15 Career
16 ボーノレスプライン  16 Bono Respline
17 ローデイング装置 ステー 17 Loading device Stay
支持環  Support ring
第一揺動フレーム 第二揺動フレーム 第一支持フレーム 第二支持フレーム 前輪用出力歯車  First swing frame Second swing frame First support frame Second support frame Front wheel output gear
前輪用従動歯車  Front wheel driven gear
前輪用デフアレンシャノレギヤ 後輪用出力歯車  Differential wheel gear for front wheel Output gear for rear wheel
後輪用従動歯車  Rear wheel driven gear
第一トラニオン  First trunnion
第二トラニオン  Second trunnion
、 32a 変位軸 32a Displacement axis
第一枢軸  First axis
支持軸  Support shaft
支柱部 Prop section
a, 36b 油圧シ!;ンダa, 37b ロッドa, 36b Hydraulic rod !; Da a, 37b Rod
a, 38b ビス卜ン a, 38b
制御弁  Control valve
カム面  Cam surface
プ; =、ノ、、ャ スプーノレ  = 、 No 、、 jassupunore
スリーブ  sleeve
制御モータ  Control motor
第一キヤビティ  First cavity
第二キヤビティ 主体 Second cavity Subject
端板 End plate
ねじ screw
支持壁部 Support wall
円孔 Round hole
ラジアルニードノレ軸受 スラストニードノレ軸受 外輪 Radial needle roller bearing Thrust needle roller bearing Outer ring
間座 Spacer
円孔 Round hole
大径部 Large diameter part
小径部 Small diameter part
段部 Step
スラスト玉軸受 外輪 Thrust ball bearing Outer ring
ラジアルニードル軸受 スラストニードル軸受 ラジアルニードノレ軸受 揺動制限手段 凸部 Radial needle bearing Thrust needle bearing Radial needle bearing Bearing swing limiter Convex part
凹部 Recess
凹孔部 Recessed hole
仕切り部材 係合凹部 Partition member Engaging recess
第一の通油路 第二の通油路 ストッパ部材 円板部 75 係止凸部 First oil passage Second oil passage Stopper member Disk 75 Locking projection
76 内輪  76 Inner ring
77 弾性部材  77 Elastic member
発明を実施するための最良の形態  BEST MODE FOR CARRYING OUT THE INVENTION
[0027] 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、揺動制限手段を、 凸部と凹部とにより構成する。これら凸部及び凹部は、各トラ-オンの両端部に設け た枢軸の端面と、これら各端面に対向する各揺動フレームの内面とに、それぞれ設 ける (枢軸の端面と揺動フレームの内面とのうちの何れに凸部或は凹部を設けるかは 問わない)。そして、上記凸部を上記凹部に、これら各トラ-オンの揺動方向に関す る変位湘対変位)を可能に挿入した状態に組み合わせる。そして、これら各トラ-ォ ンの揺動に基づき上記凸部の側面と上記凹部の内面とを当接させる事により、これら 各トラニオンが所定以上揺動するのを阻止する。  [0027] When the present invention is implemented, preferably, as described in claim 2, the swing limiting means is constituted by a convex portion and a concave portion. These convex portions and concave portions are respectively provided on the end surfaces of the pivots provided at both ends of each troon and the inner surfaces of the swing frames facing the respective end surfaces (the end surfaces of the pivot and the inner surfaces of the swing frames). It does not matter which of the projections or depressions is provided). Then, the convex portion is combined with the concave portion in such a manner that the displacement (displacement relative to the swing direction of each of these trons) can be inserted. Then, the side surfaces of the convex portions and the inner surface of the concave portions are brought into contact with each other based on the swinging of the trons, thereby preventing the trunnions from swinging more than a predetermined amount.
[0028] この様に構成すれば、上記各トラ-オン延いてはこれら各トラ-オンに支持した各 パワーローラが過度に傾斜する事を防止できる構造を、単純で、し力も設置スペース を嵩ませる事なく実現できる。  [0028] With this configuration, the structure that can prevent each of the above-described trons and the respective power rollers supported by the respective trons from being excessively tilted is simple, and the installation force increases the installation space. It can be realized without failure.
[0029] 又、請求項 2に記載した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、凸部の側面と凹部の内面との間に、トラニオンの揺動に対する抵抗となる抵抗手 段、言い換えれば、上記トラ-オンに制振力(ダンピング力)を付与する抵抗手段 (ダ ンパ手段)を設ける。例えば、請求項 4に記載した様に、この抵抗手段を、凸部の側 面と凹部の内面とにより構成される空間内に導入した潤滑油を、この凸部の変位に 基づいてこの空間から出入させる構成を有するものとする。或は、請求項 5に記載し た様に、上記抵抗手段を、互いに対向する凸部の側面と凹部の内面との間で弾性部 材を挟持する事により構成する。  [0029] Further, when the invention described in claim 2 is carried out, preferably, as described in claim 3, resistance between the side surface of the convex portion and the inner surface of the concave portion is a resistance to the swing of the trunnion. Resistance means, in other words, resistance means (damper means) for applying a damping force (damping force) to the above-described trunnion is provided. For example, as described in claim 4, the lubricating oil introduced into the space constituted by the side surface of the convex portion and the inner surface of the concave portion is removed from this space based on the displacement of the convex portion. It shall have a configuration for entering and exiting. Alternatively, as described in claim 5, the resistance means is configured by sandwiching an elastic member between the side surface of the convex portion and the inner surface of the concave portion facing each other.
[0030] この様な抵抗手段 (ダンバ手段)を設ければ、上記各トラ-オン延 、てはこれら各ト ラニオンに支持した各パワーローラが過剰に傾斜 (不必要に振動)する事を防止でき る。即ち、急激なトルク変動等に基づき変速比が所定の値に収束しなくなるハンチン グが生じる傾向となったとしても、上記各パワーローラを支持した上記各トラ-オンは 、上記抵抗手段を構成し、これら各トラ-オンが揺動する事に対し抵抗となる物体 (潤 滑油、弾性部材)により、過剰に揺動するのを阻止される。この為、この様なハンチン グが生じにくくなり、伝達効率の低下、振動の増大、更には走行安定性の低下を防 止できる。 [0030] By providing such a resistance means (damper means), it is possible to prevent each of the above-mentioned trunnions from extending excessively (or unnecessarily vibrating) the power rollers supported by these trunnions. it can. That is, even if there is a tendency for the hunting to occur such that the gear ratio does not converge to a predetermined value due to a sudden torque fluctuation or the like, each of the traons supporting the power rollers constitutes the resistance means. , An object that resists the swinging of these trillions Excessive rocking is prevented by the lubricating oil and the elastic member. For this reason, such hunting is less likely to occur, and it is possible to prevent a decrease in transmission efficiency, an increase in vibration, and a decrease in running stability.
実施例 1  Example 1
[0031] 図 1〜3は、請求項 1〜4に対応する、本発明の実施例 1を示している。尚、本発明 の特徴は、(第一、第二)トラニオン 30 (31)に支持した (第一、第二)パワーローラ 4 ( 7)が過度に傾斜する事を防止する事により、これら (第一、第二)パワーローラ 4 (7) 並びに (第一、第二)入力側、出力側各ディスク 2、 5、 3、 6 (図 5参照)の耐久性を確 保する点にある。その他の部分の構造及び作用は、前述の図 5〜8に示した従来構 造と同様であるから、重複する図示及び説明を省略若しくは簡略にし、以下、図 1〜 3に示した部分の構造及び作用に就いて説明する。又、以下の説明は、キヤビティが 別である事を表す第一、第二各部材の「第一」、「第二」を省略して行なう。  [0031] FIGS. 1 to 3 show Embodiment 1 of the present invention corresponding to claims 1 to 4. FIG. The feature of the present invention is that the (first and second) power rollers 4 (7) supported by the (first and second) trunnions 30 (31) are prevented from being inclined excessively. The first and second) are to ensure the durability of the power rollers 4 (7) and (first and second) the input side and output side disks 2, 5, 3, 6 (see FIG. 5). Since the structure and operation of the other parts are the same as those of the conventional structure shown in FIGS. 5 to 8, the overlapping illustrations and explanations are omitted or simplified, and the structure of the parts shown in FIGS. The operation will be described. In the following explanation, “first” and “second” of the first and second members indicating that the cavities are different will be omitted.
[0032] 支持フレーム 23 (24)に支持軸 34 (図 5〜8参照)を介して支持される各揺動フレー ム 21 (22) ίま、略コ字形の主体 47の両端面に 1対の端板 48、 48を、ねじ 49、 49によ り結合固定して成る。上記主体 47の両端部に設けた 1対の支持壁部 50、 50に互い に同心に形成した円孔 51、 51の内側に、上記各トラ-オン 30 (31)の両端部に互い に同心に設けた枢軸 33、 33を、軸方向の変位を阻止した状態で、揺動のみ自在に 支持している。この為に本実施例の場合は、上記各円孔 51、 51の内周面と上記各 枢軸 33、 33の外周面との間に、ラジアル-一ドル軸受 52、 52とスラスト-一ドル軸受 53、 53とを設けている。  [0032] Each swing frame 21 (22) is supported by the support frame 23 (24) via the support shaft 34 (see FIGS. 5 to 8). The end plates 48, 48 are connected and fixed by screws 49, 49. Inside the circular holes 51, 51 concentrically formed in a pair of support wall portions 50, 50 provided at both ends of the main body 47, concentric with each other at both ends of each of the trone 30 (31). The pivots 33 and 33 provided on the shaft are supported only in a swinging manner in a state where axial displacement is prevented. For this reason, in the case of the present embodiment, between the inner peripheral surface of each of the circular holes 51 and 51 and the outer peripheral surface of each of the pivot shafts 33 and 33, the radial-one dollar bearing 52, 52 and the thrust-one dollar bearing. 53 and 53 are provided.
[0033] そして、これら両ニードル軸受 52、 53を同心に配置する為に、これら両ニードル軸 受 52、 53の外輪 54、 54の外周面と、上記各円孔 51、 51に内嵌固定した間座 55、 5 5の内周面とを、球面嵌合させている。上記両ニードル軸受 52、 53は、この様にして 調心性を持たせた上記各外輪 54、 54と、上記各枢軸 33、 33の外周面に外嵌した内 輪 76、 76との間に、それぞれ複数個ずつの-一ドルを配置する事で構成している。  [0033] In order to arrange these needle bearings 52 and 53 concentrically, they are fitted and fixed to the outer peripheral surfaces of the outer rings 54 and 54 of the needle bearings 52 and 53 and the circular holes 51 and 51, respectively. The inner circumferential surfaces of the spacers 55 and 55 are spherically fitted. The both needle bearings 52, 53 are arranged between the outer rings 54, 54, which are aligned in this way, and the inner rings 76, 76 fitted on the outer peripheral surfaces of the pivots 33, 33. Each is composed of several dollars.
[0034] 上述の様にして、上記各揺動フレーム 21 (22)に、上記各枢軸 33、 33を中心とす る揺動変位のみ自在に支持された、上記各トラニオン 30 (31)の中間部に、変位軸 3 2aの基半部を、揺動変位自在に支持している。この為にこれら各トラ-オン 30 (31) の中間部に円孔 56を、これら各トラニオン 30 (31)の内外両周面同士を貫通する状 態で形成している。これら各円孔 56は、上記各トラ-オン 30 (31)の内側面側の大径 部 57と外側面側の小径部 58とを段部 59により連続させた、段付形状である。そして 、この様な円孔 56内に、アンギユラ型のスラスト玉軸受 60を構成する外輪 61と一体 に形成した上記変位軸 32aを、ラジアル-一ドル軸受 62により回転自在に支持して いる。又、上記外輪 61の外側面と上記各トラ-オン 30 (31)の内側面との間にスラス トニードル軸受 63を設け、上記変位軸 32aを中心とする、上記外輪 61及びパワー口 ーラ 4 (7)の変位を円滑に行なえる様にしている。又、上記スラスト玉軸受 60と、別の ラジアル-一ドル軸受 64とにより上記パワーローラ 4 (7)を、上記変位軸 32aの先半 部の周囲に回転自在に支持して 、る。 [0034] As described above, each trunnion 30 (31) is supported in an intermediate manner between each trunnion 30 (31), which is supported by the respective swing frames 21 (22) so that only the swing displacement about the pivots 33 and 33 is freely supported. The base half portion of the displacement shaft 32a is supported on the portion so as to be swingable and displaceable. For this purpose, each of these traons 30 (31) A circular hole 56 is formed in an intermediate portion of the trunnion 30 (31) so as to penetrate both inner and outer peripheral surfaces. Each of the circular holes 56 has a stepped shape in which a large-diameter portion 57 on the inner surface side and a small-diameter portion 58 on the outer surface side of each of the above-described trolons 30 (31) are continuously connected by a step portion 59. In addition, the displacement shaft 32a formed integrally with the outer ring 61 constituting the angiular thrust ball bearing 60 is rotatably supported by the radial-dollar bearing 62 in such a circular hole 56. Further, a thrust needle bearing 63 is provided between the outer side surface of the outer ring 61 and the inner side surface of each of the truons 30 (31), and the outer ring 61 and the power inlet 4 around the displacement shaft 32a. The displacement of (7) can be performed smoothly. The thrust roller bearing 60 and another radial-single bearing 64 support the power roller 4 (7) rotatably around the front half of the displacement shaft 32a.
[0035] 更に本実施例の場合には、上記各揺動フレーム 21 (22)と上記各トラ-オン 30 (31 )との間に、これら各トラニオン 30 (31)が所定以上揺動するのを阻止する為の揺動 制限手段 65、 65を設けている。本実施例の場合、これら各揺動制限手段 65、 65を 、 1対の凸部 66、 66と 1対の凹部 67、 67とによりそれぞれ構成している。即ち、上記 各揺動フレーム 21 (22)の両端部に結合固定した前記各端板 48、 48の内側面で、 上記各トラ-オン 30 (31)の両端部に設けた各枢軸 33、 33の端面と対向する部分に 、この内側面力も凹入する状態で有底状の凹孔部 68、 68を設けている。そして、こ れら各凹孔部 68、 68の径方向反対側 2個所位置に、開口部が扇状の上記凹部 67、 67を、それぞれ設けている。  [0035] Further, in the case of this embodiment, each trunnion 30 (31) swings more than a predetermined amount between each swing frame 21 (22) and each trunnon 30 (31). Oscillation limiting means 65, 65 are provided to prevent this. In the case of the present embodiment, each of the swing restricting means 65, 65 is constituted by a pair of convex portions 66, 66 and a pair of concave portions 67, 67, respectively. That is, on the inner side surfaces of the end plates 48 and 48 coupled and fixed to both ends of the swing frames 21 (22), the pivots 33 and 33 provided on both ends of the trone 30 (31) are provided. A bottomed concave hole 68, 68 is provided in a portion facing the end surface of the base plate in a state where the inner surface force is also recessed. The concave portions 67 and 67 each having a fan-like opening are provided at two positions on the opposite sides in the radial direction of the concave holes 68 and 68, respectively.
[0036] この為に、本実施例の場合は、上記各凹孔部 68、 68に仕切り部材 69、 69をこれら 各凹部 68、 68内での回転を阻止した状態で嵌着し、この仕切り部材 69、 69の側面 と上記凹孔部 68、 68の内面(内周面並びに底面)とに囲まれた部分により、上記各 凹部 67、 67を構成している。上記各仕切り部材 69、 69は、上記各凹孔部 68、 68の 底面に設けた係合凹部 70、 70に係合させた状態で、これら各凹孔部 68、 68の円周 方向に関する変位を阻止される。又、これら各仕切り部材 69、 69の外周面が上記凹 孔部 68、 68の内周面に嵌合する事で、これら各仕切り部材 69、 69がこれら凹孔部 6 8、 68の径方向に関する変位を阻止される。又、これら各仕切り部材 68、 68の中心 に、前記スラスト玉軸受 60やラジアル-一ドル軸受 62、 64等の、冷却並びに潤滑を 必要とする部分に潤滑油を供給する為の第一の通油路 71を設けると共に、この第一 の通油路 71の径方向外側に、上記各凹部 67、 67内に潤滑油を給排する為の第二 の通油路 72、 72を設けている。 For this reason, in the case of the present embodiment, the partition members 69 and 69 are fitted in the respective recessed hole portions 68 and 68 in a state in which the rotation in the respective recessed portions 68 and 68 is prevented. The respective recesses 67 and 67 are constituted by the portions surrounded by the side surfaces of the members 69 and 69 and the inner surfaces (inner peripheral surface and bottom surface) of the recessed hole portions 68 and 68. The partition members 69 and 69 are displaced in the circumferential direction of the recessed hole portions 68 and 68 in a state where they are engaged with the engaging recessed portions 70 and 70 provided on the bottom surfaces of the recessed hole portions 68 and 68. Is prevented. Further, the outer peripheral surfaces of the partition members 69 and 69 are fitted into the inner peripheral surfaces of the concave holes 68 and 68, so that the partition members 69 and 69 are in the radial direction of the concave holes 68 and 68. Is prevented from displacement. In addition, cooling and lubrication of the thrust ball bearing 60 and the radial-dollar bearings 62 and 64 are provided at the center of the partition members 68 and 68. A first oil passage 71 is provided to supply the lubricating oil to the required part, and the lubricating oil is supplied and discharged into the recesses 67 and 67 on the radially outer side of the first oil passage 71. Second oil passages 72, 72 are provided for this purpose.
[0037] 一方、上記各トラ-オン 30 (31)の両端部に設けた各枢軸 33、 33の端面で、上記 各端板 48、 48の内側面に設けた上記各凹孔部 68、 68と対向する位置に、円環状 のストツパ部材 73を固定している。このストッパ部材 73は、図 3に詳示する様に、円板 部 74の軸方向両側面に前記凸部 66、 66並びに係止凸部 75、 75を、これら各側面 から軸方向に突出する状態で、それぞれ設けている。このうちの各凸部 66、 66は、 上記円板部 74の片側面 {図 3 (A)の下側面、同じく(B)の上側面、図 1の外側面 }の 径方向外側寄り部分で、この円板部 74の径方向反対側 2個所位置に、それぞれ設 けている。又、上記各係止凸部 75、 75は、上記円板部 74の他側面 {図 3 (A)の上側 面、同じく(B)の下側面、図 1の内側面 }の径方向内側寄り部分で、この円板部 74の 円周方向に関して上記各凸部 66、 66と 90度ずれた位置に、それぞれ設けている。  [0037] On the other hand, the recessed holes 68, 68 provided on the inner surfaces of the end plates 48, 48 at the end surfaces of the pivots 33, 33 provided at both ends of the respective trone 30 (31). An annular stopper member 73 is fixed at a position opposite to. As shown in detail in FIG. 3, the stopper member 73 projects the convex portions 66, 66 and the locking convex portions 75, 75 on both side surfaces in the axial direction of the disc portion 74 from the respective side surfaces in the axial direction. Each is provided in a state. Each of the convex portions 66, 66 is a radially outward portion of one side surface of the disk portion 74 (the lower side surface of Fig. 3 (A), the upper side surface of (B), the outer side surface of Fig. 1). These disc portions 74 are respectively provided at two positions on the opposite side in the radial direction. Each of the locking projections 75, 75 is located on the other side of the disc 74 (upper side in FIG. 3 (A), lower side in (B), inner side in FIG. 1) radially inward. This is provided at a position shifted by 90 degrees from each of the convex portions 66 and 66 with respect to the circumferential direction of the disc portion 74.
[0038] そして、上記各係止凸部 75、 75を上記各枢軸 33、 33の端面に形成した図示しな い係止凹部に係止する事により、上記ストッパ部材 73を上記各トラ-オン 30 (31)の 両端部に、このトラ-オン 30 (31)に対する相対回転を阻止した状態で固定している 。この状態で、上記各凸部 66、 66が上記各凹部 67、 67に、上記各トラニオン 30 (31 )の揺動方向に関する変位を可能に挿入される。又、これと共に、これら各トラ-オン 30 (31)の揺動に基づき上記各凸部 66、 66の側面が、上記各凹部 67、 67の内面で 前記仕切り部材 69、 69の側面に当接する事により、これら各トラ-オン 30 (31)が所 定以上揺動するのを阻止される。言い換えれば、上記各凸部 66、 66は、上記凹部 6 7、 67内に挿入した状態で、上記トラ-オン 30 (31)の揺動方向に関する変位を、こ れら各凸部 66、 66の側面が上記凹部 67、 67の内面に当接しない範囲で許容される 。従って、上記各凸部 66、 66の側面同士の間隔や、上記凹部 67、 67の内面のうち で、上記各トラニオン 30 (31)の揺動に基づき上記各凸部 66、 66の側面が当接する 部分の、これら各トラニオン 30 (31)の揺動方向に関する位置関係を適切に規制する 事で、これら各トラ-オン 30 (31)、延いては、これら各トラ-オン 30 (31)に支持した 前記各パワーローラ 4 (7)の傾斜角を、所望の範囲に規制できる。 [0039] 上述の様に構成する本実施例の場合には、各揺動フレーム 21 (22)と各トラ-オン 30 (31)との間に設けた揺動制限手段 65、 65、即ち、上記各凸部 66、 66並びに各 凹部 67、 67により、これら各トラ-オン 30 (31)延いてはこれら各トラ-オン 30 (31) に支持した各パワーローラ 4 (7)が過度に傾斜する事を防止できる。即ち、これら各 ノワーローラ 4 (7)が大きく傾斜して 、る状態(トロイダル型無段変速機の変速比が 1 から大きく外れた状態)で、変速比が所定の値を行き過ぎてから所定の値に収束する オーバーシュートが生じる傾向となったとしても、上記各パワーローラ 4 (7)を支持し た上記各トラニオン 30 (31)は、上記各凸部 66、 66の側面が上記凹部 67、 67の内 面である仕切り部材 69、 69の側面に当接する事により、それ以上揺動するのを阻止 される。この為、これら各トラ-オン 30 (31)に支持した上記各パワーローラ 4 (7)の周 面と入力側、出力側各ディスク 2、 5 (3、 6)の内側面との転がり接触部(トラクシヨン部 )に形成される接触楕円が、これら各ディスク 2、 5 (3、 6)の端縁に乗り上げる事はな ぐこれら各パワーローラ 4 (7)並びに各ディスク 2、 5 (3、 6)の耐久性を確保できる。 [0038] Then, the stopper member 73 is locked to each of the trough-on by locking the locking protrusions 75, 75 into locking recesses (not shown) formed on the end surfaces of the pivots 33, 33. It is fixed to both ends of the 30 (31) in a state in which relative rotation with respect to this Trion 30 (31) is prevented. In this state, the convex portions 66 and 66 are inserted into the concave portions 67 and 67 so as to be able to be displaced in the swing direction of the trunnions 30 (31). At the same time, the side surfaces of the projections 66 and 66 come into contact with the side surfaces of the partition members 69 and 69 on the inner surfaces of the recesses 67 and 67 based on the swing of each of the trolons 30 (31). This prevents each of these TR-ONs 30 (31) from swinging more than a predetermined amount. In other words, the protrusions 66, 66 are inserted into the recesses 67, 67, and the displacement of the trol-on 30 (31) in the swinging direction is changed. As long as the side surface does not abut against the inner surface of the recesses 67, 67, it is allowed. Accordingly, the side surfaces of the convex portions 66 and 66 are abutted on the basis of the distance between the side surfaces of the convex portions 66 and 66 and the inner surface of the concave portions 67 and 67 based on the swing of the trunnions 30 (31). By appropriately restricting the positional relationship of the contacting portions of each trunnion 30 (31) with respect to the swinging direction, each of these trunnions 30 (31) and eventually each of these trunnions 30 (31) The inclination angle of each of the supported power rollers 4 (7) can be regulated within a desired range. [0039] In the case of the present embodiment configured as described above, the swing limiting means 65, 65 provided between each swing frame 21 (22) and each trol-on 30 (31), that is, Due to the convex portions 66 and 66 and the concave portions 67 and 67, the respective trolons 30 (31) and the respective power rollers 4 (7) supported by the respective truons 30 (31) are excessively inclined. Can be prevented. In other words, in the state where each of these lower rollers 4 (7) is inclined greatly (the transmission ratio of the toroidal type continuously variable transmission is greatly deviated from 1), the predetermined ratio is exceeded after the transmission ratio exceeds a predetermined value. The trunnion 30 (31) that supports the power rollers 4 (7) has the side surfaces of the convex portions 66, 66 on the side surfaces of the concave portions 67, 67. By abutting against the side surfaces of the partition members 69 and 69 which are the inner surfaces of the inner surface, further swinging is prevented. Therefore, the rolling contact portion between the peripheral surface of each of the power rollers 4 (7) supported by each of the trons 30 (31) and the inner surface of each of the input side and output side disks 2, 5 (3, 6). The contact ellipse formed in the (traction part) does not run on the edge of each of these disks 2, 5 (3, 6). Each of these power rollers 4 (7) and each disk 2, 5 (3, 6) ) Durability.
[0040] 尚、本実施例の場合、上記各凸部 66、 66の側面と上記各凹部 67、 67の内面とに より構成される空間内(図 2の斜格子で示す部分)に、前記第二の通油路 72、 72を 通じて潤滑油を送り込んでいる。そして、上記空間内に潤滑油を満たす事により、上 記各トラ-オン 30 (31)の揺動に対する抵抗となる抵抗手段を構成している。即ち、こ の様に空間内に潤滑油を満たす事により、上記各トラ-オン 30 (31)の揺動に伴い 上記各凸部 66、 66が変位する際に、これら各凸部 66、 66に上記潤滑油を搔き分け る力(潤滑油を第二の通油路 72、 72内に送り戻す力、潤滑油を各凸部 66、 66の内 径側、外径側各周面と各凹部 67、 67の内面との間の隙間を通過させる力)が加わる 様にしている。  [0040] In the case of the present embodiment, in the space formed by the side surfaces of the respective convex portions 66, 66 and the inner surfaces of the respective concave portions 67, 67 (portions indicated by oblique grids in Fig. 2), Lubricating oil is fed through the second oil passages 72, 72. Then, by filling the space with lubricating oil, a resistance means is formed which provides resistance to the swinging of each of the above-mentioned trolons 30 (31). That is, by filling the lubricating oil in the space in this way, when the respective convex portions 66, 66 are displaced in accordance with the swinging of each of the above-mentioned trolons 30 (31), these convex portions 66, 66 The force for separating the lubricating oil (the force that feeds the lubricating oil back into the second oil passages 72, 72, the lubricating oil with the peripheral surfaces on the inner and outer diameter sides of the convex portions 66, 66) A force to pass through the gap between the inner surfaces of the recesses 67 and 67 is applied.
[0041] この様な力は、上記各凸部 66、 66を設けたストツバ部材 73、 73を介して上記各トラ ユオン 30 (31)に、これら各トラニオン 30 (31)を不必要に振動するのを阻止する為 の力(制振力、ダンピング力)としてカ卩わる。この為、これら各トラ-オン 30 (31)延ぃ てはこれら各トラ-オン 30 (31)に支持した各パワーローラ 4 (7)が過剰に傾斜 (不必 要に振動)する事を防止できる。即ち、急激なトルク変動等に基づき変速比が所定の 値に収束しなくなるハンチングが生じる傾向となったとしても、上記各パワーローラ 4 ( 7)を支持した上記各トラニオン 30 (31)は、上記力に基づき過剰に揺動するのを阻 止される。この為、この様なハンチングが生じにくくなり、伝達効率の低下、振動の増 大、更には走行安定性の低下を防止できる。 [0041] Such a force unnecessarily vibrates the trunnions 30 (31) to the trillions 30 (31) via the stagger members 73, 73 provided with the convex portions 66, 66. This is used as a force (damping force, damping force) to prevent this. For this reason, it is possible to prevent the power rollers 4 (7) supported by each of the truons 30 (31) and the truons 30 (31) from being excessively inclined (vibrating unnecessarily). . That is, even if there is a tendency for hunting that the gear ratio does not converge to a predetermined value due to sudden torque fluctuations, the power rollers 4 ( Each trunnion 30 (31) supporting 7) is prevented from excessively swinging based on the force. For this reason, such hunting is less likely to occur, and it is possible to prevent a decrease in transmission efficiency, an increase in vibration, and a decrease in running stability.
[0042] 尚、上述の様に各凸部 66、 66を介して各トラ-オン 30 (31)に加わる力(制振力、 ダンピング力)は、上記第二の通油路 72、 72の内径や、各凸部 67、 67の内径側、 外径側各周面と各凹部 67、 67の内面との間の隙間の寸法を調節する事により、所 望の値に規制できる。 [0042] As described above, the force (damping force, damping force) applied to each trol-on 30 (31) via the respective convex portions 66, 66 is the same as that of the second oil passages 72, 72. By adjusting the inner diameter and the dimensions of the gaps between the inner and outer peripheral surfaces of the convex portions 67 and 67 and the inner surfaces of the concave portions 67 and 67, the desired values can be regulated.
実施例 2  Example 2
[0043] 図 4は、請求項 1〜3、 5に対応する、本発明の実施例 2を示している。本実施例の場 合には、ストッパ部材 73に設けた各凸部 66、 66の側面と、揺動フレーム 21 (図 1参 照)を構成する端板 48に設けた各凹部 67、 67の内面との間に、弾性部材 77、 77を 設ける事により、トラ-オン 30 (図 1参照)の揺動に対する抵抗となる抵抗手段を構成 している。即ち、互いに対向する上記各凸部 66、 66の側面と上記各凹部 67、 67の 内面との間で、圧縮コイルばね等の上記弾性部材 77、 77を挟持する事により、これ ら各凸部 66、 66の側面と各凹部 67、 67の内面とに互いに離れる方向の力を付与し ている。この様な力は、上記各凸部 66、 66を設けた上記ストッパ部材 73を介して上 記各トラ-オン 30に、これら各トラ-オン 30が不必要に振動するのを阻止する方向 の力(制振力、ダンピング力)として加わる。本実施例の場合、上述の様な弾性部材 7 7、 77を設ける為、上記各凸部 66、 66の側面と上記各凹部 67、 67の内面とにより構 成される空間内に潤滑油は満たしていない。この為、上記凹部 67、 67を構成する仕 切り部材 69に第二の通油路 72、 72 (図 2参照)を設けていない。その他の構成及び 作用は、前述した実施例 1と同様であるから、重複する説明は省略する。  FIG. 4 shows a second embodiment of the present invention corresponding to claims 1 to 3 and 5. In the case of the present embodiment, the side surfaces of the convex portions 66, 66 provided on the stopper member 73 and the concave portions 67, 67 provided on the end plate 48 constituting the swing frame 21 (see FIG. 1). By providing the elastic members 77 and 77 between the inner surface and the inner surface, resistance means is provided that provides resistance to the swinging of the trolley 30 (see FIG. 1). That is, by holding the elastic members 77, 77 such as compression coil springs between the side surfaces of the convex portions 66, 66 facing each other and the inner surfaces of the concave portions 67, 67, these convex portions Forces in directions away from each other are applied to the side surfaces of 66 and 66 and the inner surfaces of the recesses 67 and 67, respectively. Such a force is applied to each of the above-mentioned troons 30 through the stopper member 73 provided with the above-mentioned convex portions 66, 66 in a direction that prevents the tro-on 30 from vibrating unnecessarily. It is added as a force (damping force, damping force). In the case of the present embodiment, since the elastic members 77 and 77 as described above are provided, the lubricating oil is placed in the space formed by the side surfaces of the convex portions 66 and 66 and the inner surfaces of the concave portions 67 and 67. not filled. For this reason, the second oil passages 72 and 72 (see FIG. 2) are not provided in the cutting member 69 constituting the recesses 67 and 67. Other configurations and operations are the same as those of the first embodiment described above, and thus redundant description is omitted.
[0044] 本発明を詳細にまた特定の実施態様を参照して説明したが、本発明の精神と範囲 を逸脱することなく様々な変更や修正を加えることができることは当業者にとって明ら かである。  [0044] Although the invention has been described in detail and with reference to specific embodiments, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the invention. is there.
[0045] 本出願は、 2004年 7月 6日出願の日本特許出願 (特願 2004— 198755)に基づく ものであり、その内容はここに参照として取り込まれる。  [0045] This application is based on a Japanese patent application filed on July 6, 2004 (Japanese Patent Application No. 2004-198755), the contents of which are incorporated herein by reference.

Claims

請求の範囲 The scope of the claims
[1] それぞれが断面円弧形の凹面である互いの内側面同士を対向させた状態で、互 いに同心に、且つ互いに独立した回転自在に支持された入力側ディスク及び出力側 ディスクと、これら両ディスクの中心軸に対し捻れの位置にある枢軸を中心として揺動 する複数のトラ-オンと、これら各トラ-オンに支持された状態で上記両ディスク同士 の間に挟持された、その周面を球状凸面とした複数のパワーローラとを備え、上記各 トラ-オンの周囲に設けた支持フレームに、支持軸によりそれぞれの中間部を枢支し た、上記各トラ-オンと同数の揺動フレームを、ァクチユエータにより揺動変位自在と すると共に、上記各トラ-オンの両端部に設けた上記各枢軸を、上記各揺動フレーム の両端部に揺動自在に支持したトロイダル型無段変速機に於いて、上記各揺動フレ ームと上記各トラ-オンとの間に、これら各トラ-オンが所定以上揺動するのを阻止 する為の揺動制限手段を設けた事を特徴とするトロイダル型無段変速機。  [1] An input-side disk and an output-side disk that are supported concentrically and independently of each other in a state of being opposed to each other, each of which is a concave surface having an arc-shaped cross section, A plurality of troons swinging around a pivot that is twisted with respect to the central axes of these two disks, and sandwiched between the two disks while being supported by each of these troons. A plurality of power rollers having a spherical convex surface, and a support frame provided around each of the above-mentioned tro-ons. The oscillating frame can be oscillated and displaced by an actuator, and the pivots provided at both ends of each troon are supported at both ends of each oscillating frame so as to be freely oscillating. In the transmission A toroidal type non-rotating feature is provided, wherein a swing restricting means is provided between each of the swing frames and each of the traon to prevent the swing of each of the traons from exceeding a predetermined amount. Step transmission.
[2] 揺動制限手段は、各トラニオンの両端部に設けた枢軸の端面とこれら各端面に対 向する各揺動フレームの内面とにそれぞれ設けた凸部と凹部とにより構成するもので あり、上記凸部を上記凹部内に、上記各トラニオンの揺動方向に関する変位を可能 に挿入した状態に組み合わせ、これら各トラ-オンの揺動に基づき上記凸部の側面 と上記凹部の内面とを当接させる事により、これら各トラニオンが所定以上揺動する のを阻止する、請求項 1に記載したトロイダル型無段変速機。  [2] The swing restricting means is constituted by convex portions and concave portions respectively provided on the end surfaces of the pivots provided at both ends of each trunnion and the inner surfaces of the swing frames facing the respective end surfaces. The convex portion is combined with the concave portion so that the displacement in the swing direction of each trunnion is inserted, and the side surface of the convex portion and the inner surface of the concave portion are connected based on the swing of each trunnion. The toroidal continuously variable transmission according to claim 1, wherein the trunnions are prevented from swinging by a predetermined amount or more by being brought into contact with each other.
[3] 凸部の側面と凹部の内面との間に、トラ-オンの揺動に対する抵抗となる抵抗手段 を設けた、請求項 2に記載したトロイダル型無段変速機。  [3] The toroidal-type continuously variable transmission according to claim 2, wherein a resistance means is provided between the side surface of the convex portion and the inner surface of the concave portion to be a resistance against swinging of the trunnion.
[4] 抵抗手段が、凸部の側面と凹部の内面とにより構成される空間内に導入した潤滑 油を、この凸部の変位に基づいてこの空間から出入させる構成を有するものである、 請求項 3に記載したトロイダル型無段変速機。  [4] The resistance means has a configuration in which the lubricating oil introduced into the space constituted by the side surface of the convex portion and the inner surface of the concave portion is caused to enter and leave the space based on the displacement of the convex portion. Item 4. A toroidal-type continuously variable transmission according to item 3.
[5] 抵抗手段が、互いに対向する凸部の側面と凹部の内面との間で弾性部材を挟持 する事により構成したものである、請求項 3に記載したトロイダル型無段変速機。  5. The toroidal continuously variable transmission according to claim 3, wherein the resistance means is configured by sandwiching an elastic member between a side surface of the convex portion and the inner surface of the concave portion facing each other.
PCT/JP2005/011831 2004-07-06 2005-06-28 Toroidal type stepless speed change device WO2006003886A1 (en)

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JP2004198755A JP4774694B2 (en) 2004-07-06 2004-07-06 Toroidal continuously variable transmission
JP2004-198755 2004-07-06

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CN100460715C (en) 2009-02-11
JP4774694B2 (en) 2011-09-14
DE112005001589B4 (en) 2010-08-26
CN1997841A (en) 2007-07-11
DE112005001589T5 (en) 2007-06-28

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