A transmission arrangement includes an input shaft, an output shaft, an outer race mounted on one end of one of the input and output shafts, an inner race mounted on one end of the other of the input and output shafts, ball bearings, and first and second finger assists. The inner and outer races are arranged to create a cage. The ball bearings are disposed within the cage and spaced apart from each other. The first finger assist is mounted to press at least a first one of the ball bearings into position within the cage. The second finger assist is mounted to press at least a second one of the ball bearings into position within the cage. The second finger assist is disposed in registration with the first finger assist.

A speed reducer including: an input shaft; a first barrel cam; a first output table; an intermediate shaft; a second cam; and a second output table, in the first output table, the plurality of first cam followers being provided concentrically around a rotation center position of the intermediate shaft, concerning a certain first cam follower among the plurality of first cam followers, when a center position of the certain first cam follower when the certain first cam follower has been moved to a farthest end on one side in the up-down direction is defined as a reference position, a center position of the first barrel cam being shifted to another side in the up-down direction with respect to the reference position, an engagement center position in the front-rear direction between an engagement start position and an engagement end position being shifted either of forward and rearward with respect to the reference position.

A speed reducer including: an input shaft; a first barrel cam; a first output table; an intermediate shaft; a second cam; and a second output table, in the first output table, the plurality of first cam followers being provided concentrically around a rotation center position of the intermediate shaft, concerning a certain first cam follower among the plurality of first cam followers, when a center position of the certain first cam follower when the certain first cam follower has been moved to a farthest end on one side in the up-down direction is defined as a reference position, a center position of the first barrel cam being shifted to another side in the up-down direction with respect to the reference position, an engagement center position in the front-rear direction between an engagement start position and an engagement end position being shifted either of forward and rearward with respect to the reference position.

A transmission arrangement includes an input shaft, an output shaft, an outer race mounted on one end of one of the input and output shafts, an inner race mounted on one end of the other of the input and output shafts, ball bearings, and first and second finger assists. The inner and outer races are arranged to create a cage. The ball bearings are disposed within the cage and spaced apart from each other. The first finger assist is mounted to press at least a first one of the ball bearings into position within the cage. The second finger assist is mounted to press at least a second one of the ball bearings into position within the cage. The second finger assist is disposed in registration with the first finger assist.

A transmission arrangement includes an input shaft, an output shaft, an outer race mounted on one end of one of the input and output shafts, an inner race mounted on one end of the other of the input and output shafts, ball bearings, and first and second finger assists. The inner and outer races are arranged to create a cage. The ball bearings are disposed within the cage and spaced apart from each other. The first finger assist is mounted to press at least a first one of the ball bearings into position within the cage. The second finger assist is mounted to press at least a second one of the ball bearings into position within the cage. The second finger assist is disposed in registration with the first finger assist.

An internal-meshing planetary gear device includes an internally toothed gear provided with internal teeth and is fixed to an outer ring. A planetary gear is provided with external teeth which partially mesh with the internal teeth. A plurality of internal pins is respectively inserted into a plurality of internal pin holes formed on the planetary gear revolve within the internal pin holes and rotate relative to the internally toothed gear. An inner ring includes a first inner ring and a second inner ring, which are opposite each other in a direction parallel to a rotation axis and have opposite surfaces that come in contact with each other. The first inner ring has a plurality of holding holes, through which the plurality of internal pins respectively penetrate in the direction parallel to the rotation axis. Each of the plurality of internal pins is held in the inner ring and is rotatable.

An internal-meshing planetary gear device includes an internally toothed gear provided with internal teeth and is fixed to an outer ring. A planetary gear is provided with external teeth which partially mesh with the internal teeth. A plurality of internal pins is respectively inserted into a plurality of internal pin holes formed on the planetary gear revolve within the internal pin holes and rotate relative to the internally toothed gear. An inner ring includes a first inner ring and a second inner ring, which are opposite each other in a direction parallel to a rotation axis and have opposite surfaces that come in contact with each other. The first inner ring has a plurality of holding holes, through which the plurality of internal pins respectively penetrate in the direction parallel to the rotation axis. Each of the plurality of internal pins is held in the inner ring and is rotatable.

Disclosed is a spring for preload in a planetary traction drive designed for a driven turbocharger on an engine. The ring roller of the planetary traction drive has two parts with a spring between the two parts for generating a preload force on the ring roller assembly of the planetary traction drive. The spring provides a spreading force on the ring roller, and allows for setting a desired preload force on the traction surfaces of the traction drive during assembly and operation, even with variations in manufacturing of the different parts of the traction drive.

Disclosed is a spring for preload in a planetary traction drive designed for a driven turbocharger on an engine. The ring roller of the planetary traction drive has two parts with a spring between the two parts for generating a preload force on the ring roller assembly of the planetary traction drive. The spring provides a spreading force on the ring roller, and allows for setting a desired preload force on the traction surfaces of the traction drive during assembly and operation, even with variations in manufacturing of the different parts of the traction drive.

A speed reducer including: an input shaft; a first barrel cam; a first output table; an intermediate shaft; a second cam; and a second output table, in the first output table, the plurality of first cam followers being provided concentrically around a rotation center position of the intermediate shaft, concerning a certain first cam follower among the plurality of first cam followers, when a center position of the certain first cam follower when the certain first cam follower has been moved to a farthest end on one side in the up-down direction is defined as a reference position, a center position of the first barrel cam being shifted to another side in the up-down direction with respect to the reference position, an engagement center position in the front-rear direction between an engagement start position and an engagement end position being shifted either of forward and rearward with respect to the reference position.