Continuously variable transmission
First Claim
1. A mechanical continuously variable transmission capable of forward and reverse rotation comprising a power roller, which is rotated by a rotation axle connected on an input axle side, in contact with a plurality of counter rollers, which are connected on an output axle, and are driven to rotate by the rotation of the power roller, whereina concave roll surface, which forms a circular arc if it were cut off along a plane going through the rotational center axis of the counter roller, is formed on the surface of each counter roller and the plurality of counter rollers are assembled rotatably neighboring each other on the same periphery of a disk connected to the output axle, whereby the circular arcs of the concave roll surfaces form a roughly continuous circle;
- a spherical roll surface is formed on the surface of the power roller so that a line which appears on the surface if the roll surface were cut off along a plane including a circle formed by said circular arcs of the counter rollers, becomes the same circular arc as the circular arc of said concave roll surfaces, whereby the power roller comes into line contact with each counter roller; and
the rotation axle of the power roller is constructed and arranged so as to be continuously inclined with respect to the disk.
0 Assignments
0 Petitions
Accused Products
Abstract
A mechanical continuously variable transmission in which the power roller is in “line contact” with the counter roller instead of conventional “pinpoint contact”. By utilizing line contact of the power roller and the counter roller, the pressure force between the metal components of a mechanical continuously variable transmission can be reduced. In addition, the line contact also reduces extra energy for maintaining the operation thereof. The configuration of the roll surface of the power roller, which is rotated by a rotation axle connected to an input axle, is formed into a partial configuration of a sphere. A plurality of counter rollers, which are in line contact with the power roller having said roll surface, are arranged in a circle by a disk. Each counter roller is formed with a concave roll surface corresponding to the partial configuration of the sphere on the surface thereof. The counter rollers are driven to rotate by the rotation of the power roller in contact therewith. Each counter roller is assembled rotatably on the same periphery of the disk connected to an output axle so that the concave roll surfaces neighboring to each other roughly continue into a toric shape. A rotation axle of the power roller is adapted so as to be continuously inclined with respect to the disk.
-
Citations
10 Claims
-
1. A mechanical continuously variable transmission capable of forward and reverse rotation comprising a power roller, which is rotated by a rotation axle connected on an input axle side, in contact with a plurality of counter rollers, which are connected on an output axle, and are driven to rotate by the rotation of the power roller, wherein
a concave roll surface, which forms a circular arc if it were cut off along a plane going through the rotational center axis of the counter roller, is formed on the surface of each counter roller and the plurality of counter rollers are assembled rotatably neighboring each other on the same periphery of a disk connected to the output axle, whereby the circular arcs of the concave roll surfaces form a roughly continuous circle; -
a spherical roll surface is formed on the surface of the power roller so that a line which appears on the surface if the roll surface were cut off along a plane including a circle formed by said circular arcs of the counter rollers, becomes the same circular arc as the circular arc of said concave roll surfaces, whereby the power roller comes into line contact with each counter roller; and the rotation axle of the power roller is constructed and arranged so as to be continuously inclined with respect to the disk. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
Specification