CONTINUOUSLY VARIABLE TRANSMISSION

摘要

A continuously variable transmission includes: first to third power transmission components; a rolling component; a support shaft for the rolling component; a first guide member that includes a first guide portion for guiding a first protrusion portion of the inserted support shaft; a gear shift member that includes a gear change portion; a first actuator which tilts each rolling component by moving each second protrusion portion along the gear change portion with rotation of the gear shift member at a time an input-output gear ratio is changed; a second guide member that includes a second guide portion for guiding a second protrusion portion of the inserted support shaft; and a second actuator which prohibits rotation of the second guide member during reverse rotation of the first and second power transmission components and allows rotation of the second guide member during normal rotation of the first and second power transmission components.

主权项

1. A continuously variable transmission comprising:
first to third power transmission components which have a first rotation axis commonly set for each other and are relatively rotatable in a circumferential direction with respect to the first rotation axis; a rolling component which has a second rotation axis, is radially disposed at a plurality of positions about the first rotation axis on an outer peripheral surface of the third power transmission component, and is sandwiched between the first and second power transmission components disposed to face each other; a support shaft for the rolling component which is concentric with the second rotation axis and of which both ends protrude from the rolling component; a first guide member that includes a first guide portion for guiding a first protrusion portion of the support shaft inserted thereinto in a radial direction with respect to the first rotation axis and is not rotatable; a gear shift member that includes a gear change portion, into which the second protrusion portion is inserted and of which a longitudinal direction is tilted with respect to the radial direction so that forces applied between the second protrusion portion and a side wall of the gear change portion match each other during normal rotation of the first and second power transmission components, and is rotatable in the circumferential direction; a first actuator which tilts each rolling component by moving each second protrusion portion along the gear change portion with rotation of the gear shift member at a time an input-output gear ratio is changed; a second guide member that includes a second guide portion for guiding a second protrusion portion of the inserted support shaft in the radial direction and is rotatable in the circumferential direction by applying a force to a side wall of the second guide portion; and a second actuator which prohibits rotation of the second guide member at a position where the first guide portion and the second guide portion face each other in an axial direction of the first rotation axis by engaging a second engagement portion of the second guide member with a first engagement portion thereof during reverse rotation of the first and second power transmission components and allows rotation of the second guide member by operating the second engagement portion so that an engagement state with respect to the first engagement portion is released during the normal rotation of the first and second power transmission components.