Embodiments of this application provide a speed shifting apparatus, a control method thereof, a steering system, and a control method thereof, and relate to the field of mechanical transmission technologies. The speed shifting apparatus includes: an outer rotating wheel; an inner rotating wheel, where a rotation axis of the inner rotating wheel is parallel to and different from a rotation axis of the outer rotating wheel; and a plurality of meshing members, arranged along a circumferential direction of the inner rotating wheel or the outer rotating wheel. Either the outer rotating wheel or the inner rotating wheel is provided with a plurality of sliding grooves, and the plurality of sliding grooves are in a one-to-one correspondence with the plurality of meshing members.

A variable acceleration curved surface spiral gear transmission mechanism for accelerated oscillator damper damping systems is disclosed. Through the orthogonal orbit planetary gear set moving along the parallel circular arc line guide rail, the concave surface spiral gear and the convex surface spiral gear are meshed at different radii, so as to realize the continuous changing of the speed ratio and changing of the acceleration of the additional mass block. The spiral curve limit guide groove is set on the surface of concave surface spiral gear and convex surface spiral gear, and the changing rate of speed changing ratio is adjusted by designing different spiral curves, and then the acceleration changing rate of additional mass block is controlled.

A variable acceleration curved surface spiral gear transmission mechanism for accelerated oscillator damper damping systems is disclosed. Through the orthogonal orbit planetary gear set moving along the parallel circular arc line guide rail, the concave surface spiral gear and the convex surface spiral gear are meshed at different radii, so as to realize the continuous changing of the speed ratio and changing of the acceleration of the additional mass block. The spiral curve limit guide groove is set on the surface of concave surface spiral gear and convex surface spiral gear, and the changing rate of speed changing ratio is adjusted by designing different spiral curves, and then the acceleration changing rate of additional mass block is controlled.

The present invention is a variable-ratio line gear mechanism. The mechanism forms a transmission pair consisting of a driving line gear and a driven line gear, of which axes intersect at an arbitrary angle. Transmission is generated by point contact meshing movement of line teeth between the driving line gear and the driven line gear. A contact curve of the line tooth is designed in accordance with space conjugate curve meshing theory, and the designing equation is divided into an equal transmission ratio part and a variable transmission ratio part. The equal transmission ratio part provides a uniform transmission, and the variable transmission ratio part makes the transmission ratio smoothly transit. The line gear mechanism is able to provide periodically transmission with variable transmission ratio, to provide a plurality of transmission ratios during a movement period of the driven line gear, and to enable smooth transitions between respective transmission ratios in accordance with movement rules.

The present invention is a variable-ratio line gear mechanism. The mechanism forms a transmission pair consisting of a driving line gear and a driven line gear, of which axes intersect at an arbitrary angle. Transmission is generated by point contact meshing movement of line teeth between the driving line gear and the driven line gear. A contact curve of the line tooth is designed in accordance with space conjugate curve meshing theory, and the designing equation is divided into an equal transmission ratio part and a variable transmission ratio part. The equal transmission ratio part provides a uniform transmission, and the variable transmission ratio part makes the transmission ratio smoothly transit. The line gear mechanism is able to provide periodically transmission with variable transmission ratio, to provide a plurality of transmission ratios during a movement period of the driven line gear, and to enable smooth transitions between respective transmission ratios in accordance with movement rules.

Provided is a continuous variable transmission for a motorcycle having a radial engine, the transmission including a cone shaped gear, a driveshaft received in one end of the cone shaped gear, a gear plate having an angled geared surface configured to mate with the cone shaped gear, a drive clutch, a crank shaft extending through the drive clutch, and a plurality of fingers secured to the drive clutch and configured to move from a first position to a second position wherein the fingers are in a first position at a first speed and the fingers are at a second position, at a second speed.

A multifunctional rotating element is usable as various parts of a powertrain. The multifunctional rotating element includes a body and a plurality of contact elements. The body has an axis of rotation and is configured to rotate about the axis of rotation, and defines a rim portion. The plurality of contact elements are arranged around the rim portion. Each of the contact elements is independently movable between a raised position and a depressed position and biased to the raised position. Each of the contact elements is configured to move to the depressed position when engaged with an object.

A multifunctional rotating element is usable as various parts of a powertrain. The multifunctional rotating element includes a body and a plurality of contact elements. The body has an axis of rotation and is configured to rotate about the axis of rotation, and defines a rim portion. The plurality of contact elements are arranged around the rim portion. Each of the contact elements is independently movable between a raised position and a depressed position and biased to the raised position. Each of the contact elements is configured to move to the depressed position when engaged with an object.

A transmission comprising: a casing having: a first shaft having a truncated cone portion, a second shaft parallel to and spaced away from the truncated cone portion, a first gear mounted on the second shaft, the first gear being configured for rotation with the second shaft, the first gear being in connection with the first shaft, a linear actuator connected to the first gear, the linear actuator allowing to position the first gear at any one of a plurality of positions along the second shaft, the truncated cone portion having, at its beginning and its end, a respective one of a set of gears with a respective diameter and a respective number of teeth being proportionate to a diameter of the truncated cone portion, at least two counter-wound spiral gear tracks extending between the respective one of the set of gear s and another one of the set of gears.

A variable gear system for various embodiments of continuously variable transmissions comprises a gear including a radius, an axis, and spherical teeth spaced from each other by a constant pitch. The spherical teeth of the gear engage a splined shaft comprising a radius that varies nonlinearly along a length of the splined shaft, an axis running the length of the splined shaft, and splines along the length of the splined shaft. Further, a portion of the length of the shaft across a seam of the splined shaft includes a non-constant pitch between the splines.