CONTINUOUSLY VARIABLE TRANSMISSION

摘要

A continuously variable transmission includes plural planetary balls, a carrier, a sun roller, an input shaft, an output shaft, and thrust bearings sandwiched between respective holding surfaces of the input shaft and the output shaft, wherein the holding surface at a time of rest is formed such that a space between the holding surface and a race on one side of the thrust bearing becomes wider on an outside in a radial direction than on an inside in the radial direction, and the holding surface at the time of rest is formed such that a space between the holding surface and a race on the other side of the thrust bearing becomes wider on the outside in the radial direction than on the inside in the radial direction.

主权项

1. A continuously variable transmission comprising:
a transmission shaft acting as a center of rotation; first and second rotating elements that are disposed on the transmission shaft in confrontation with each other, have a common first rotation central axis, and are capable of relatively rotating with each other; a plurality of rolling members that have a second rotation central axes in parallel with the first rotation central axis, are disposed radially about the first rotation central axis, and are sandwiched between the first and second rotating elements; support shafts of the rolling members that have the second rotation central axes and project both ends from the rolling members; a holding member that tiltably hold the rolling members via the respective projecting sections of the support shafts; a third rotating element that disposes the respective rolling members on an outer circumferential surface and is capable of relatively rotating with respect to the transmission shaft as well as the first and second rotating elements; a speed change device that changes a transmission ratio by changing a rotation ratio between the first rotating element and the second rotating element by a tilt operation of the respective rolling members; an input shaft of torque that has a disk section rotating about the first rotation central axis as well as is coupled with the first rotating element, and is subjected to a reaction force of a pressure force directed from the first rotating element to the respective rolling members; an output shaft of torque that has a disk section rotating about the first rotation central axis and arranged opposite to the disk section of the input shaft as well as is coupled with the second rotating element, and is subjected to a reaction force of a pressure force directed from the second rotating element to the respective rolling members; and a bearing sandwiched between a holding surface in the disk section of the input shaft and a holding surface in the disk section of the output shaft, wherein the holding surface of the input shaft at a time of rest is formed such that a space between the holding surface and a race on one side of the bearing becomes wider on an outside in the radial direction than on an inside in the radial direction, and the holding surface of the output shaft at the time of rest is formed such that a space between the holding surface and a race on the other side of the bearing becomes wider on the outside in the radial direction than on the inside in the radial direction.