Abstract: A toroidal type continuously variable transmission which maintains a gear ratio stably and continue to use the same gear ratio control even for a different model type of support shaft for supporting rotatably a power roller which differs in shaft diameter. A power roller 11 is rotatably supported by a displacement shaft 31 which protrudes from a trunnion 6 and a thrust ball bearing 39 provided between the power roller 11 and the trunnion 6. A secondary shaft portion 34 of the displacement shaft 31 is fittingly inserted into a hole 41a in an outer race 41 of the thrust ball bearing 39. A clearance between the hole 41a in the outer race 41 and the secondary shaft portion 34 is set in a range from 0 to 0.05 mm.

Abstract: A toroidal type continuously variable transmission has an input shaft to which a rotation torque is input, an input side disk and an output side disk that are concentrically and rotatably supported by the input shaft in a state that an inner peripheral surface of the input side disk opposes to an inner peripheral surface of the output side disk, a power roller held between the input side disk and the output side disk and a hydraulic loading device applying predetermined pressing force so that the power roller is pressed between the input and output side disks. Fine grooves are formed on at least a radially inner part of the inner peripheral surface of the input side disk and at least radially outer part of the inner peripheral surface of the output side disk, respectively.

Abstract: A toroidal type continuously variable transmission has input and output side disks arranged concentrically with a first axis, a power roller, a trunnion swung around a second axis, the trunnion including a main body portion, bent wall portions, pivot shafts and an oval hole, an outer ring contained in a pocket portion provided on the trunnion and a bearing for movably supporting the outer ring in the direction perpendicular to the second axis provided between the rain body portion and the outer ring. The outer ring includes a first shaft portion for rotatably supporting the power roller and a second shaft portion arranged concentrically with the first shaft portion and movably supported by the oval hole along a direction perpendicular to the second axis. Tangential forces generated between the power roller, the input and output side disks are supported on the second shaft portion and the trunnion.

Abstract: A toroidal-type continuously variable transmission has: an input shaft; an input side disk and an output side disk respectively disposed on the outer periphery of the input shaft, the input side disk including a first cam surface; and a loading cam device interposed between the input side and output side disks and comprising: a loading cam including a second cam surface and rotatable together with the input shaft; a plurality of rollers interposed rollably between the first cam surface and the second cam surface; and a retainer, the retainer including a retainer main body having a circular-shaped fitting hole, and inside-diameter side projecting portions disposed on a retainer main body for maintaining the attitude of the retainer main body, wherein inside diameters of portions of the fitting hole corresponding to the inside-diameter side projecting portions are larger than that of the remaining portions of the fitting hole.

Abstract: A toroidal-type continuously variable transmission according to the present invention includes an input shaft, an input disk and an output disk, plural power rollers, a power roller bearing, an oil passage, and a mesh filter. The input and output disks are supported mutually concentrically with said input shaft and mutually independently rotatably. The plural power rollers are sandwiched between said input disk and said output disks. The power roller bearing rotatably supports said power rollers. The oil passage for leading lubricating oil to said power roller bearing. The mesh filter is provided in said oil passage. Accordingly, the toroidal-type continuously variable transmission can prevent an occurrence of biting-in of foreign substances at a power roller bearing, to thereby increase the life of the power roller bearing.

Abstract: The present toroidal-type continuously variable transmission comprises an oil passage formed in an input shaft so as to extend in the axial direction of the input shaft, a plurality of ball spline grooves formed in the outer peripheral surface of the input shaft so as to be spaced from one another at a given interval in the peripheral direction of the input shaft, a plurality of oil grooves not only for connecting together the ball spline grooves but also for guiding lubricating oil along the outer peripheral surface of the input shaft, and two oil holes 1a formed in the input shaft 1 for allowing the oil grooves and oil passage to communicate with each other.

Abstract: An output side disk 3 includes a penetration hole 30 for penetration of an input shaft therethrough, and a securing groove 40 formed in the inner peripheral surface of the penetration hole 30 for preventing a needle roller bearing 5 from slipping out in the axis O direction of the input shaft. The first connecting portion R3 of the securing groove 40 is formed as a surface the section of which has an arc-like shape of a large radius of curvature, whereas the second connecting portion R4 of the securing groove 40 is formed as a surface the section of which has an arc-like shape of a small radius of curvature.

Abstract: A toroidal-type continuously variable transmission has a casing; an input disk and an output disk rotatably supported concentrically with each other; a plurality of power rollers each held between the input and output disks; a plurality of trunnions disposed at position twisted with respect to a center axis; a drive device for shifting the trunnions in the axial directions or the pivot shafts; a pair of yokes for supporting the pivot shafts of each of the trunnions so as to be swung and shifted in the axial direction thereof, the yokes being swingable according to the shifting movement of the associated trunnion; and, a pair of opposing members each disposed to be opposed to the associated yoke, wherein the yokes each includes projection portion contacted with the associated opposing member, the projection portion being the fulcrum of the swinging movements of the yokes.

Abstract: A toroidal-type continuously variable transmission has: an input shaft; an input side disk and an output side disk respectively disposed on the outer periphery of the input shaft, the input side disk including a first cam surface; and a loading cam device interposed between the input side and output side disks and comprising: a loading cam including a second cam surface and rotatable together with the input shaft; a plurality of rollers interposed rollably between the first cam surface and the second cam surface; and a retainer, the retainer including a retainer main body having a circular-shaped fitting hole, and inside-diameter side projecting portions disposed on a retainer main body for maintaining the attitude of the retainer main body, wherein inside diameters of portions of the fitting hole corresponding to the inside-diameter side projecting portions are larger than that of the remaining portions of the fitting hole.

Abstract: An output side disk 3 includes a penetration hole 30 for penetration of an input shaft therethrough, and a securing groove 40 formed in the inner peripheral surface of the penetration hole 30 for preventing a needle roller bearing 5 from slipping out in the axis O direction of the input shaft. The first connecting portion R3 of the securing groove 40 is formed as a surface the section of which has an arc-like shape of a large radius of curvature, whereas the second connecting portion R4 of the securing groove 40 is formed as a surface the section of which has an arc-like shape of a small radius of curvature.

Abstract: The present toroidal-type continuously variable transmission comprises an oil passage formed in an input shaft so as to extend in the axial direction of the input shaft, a plurality of ball spline grooves formed in the outer peripheral surface of the input shaft so as to be spaced from one another at a given interval in the peripheral direction of the input shaft, a plurality of oil grooves not only for connecting together the ball spline grooves but also for guiding lubricating oil along the outer peripheral surface of the input shaft, and two oil holes 1a formed in the input shaft 1 for allowing the oil grooves and oil passage to communicate with each other.