In one example, a transmission is provided that includes a sheave of selectively variable configuration, a driven member configured to engage the sheave, and a plurality of drive members configured for radial movement to selectively engage the driven member. The transmission may be operable in one or more of the following modes: traction mode, integer mode, IN mode, and infinite mode.
In one example, a portion of a transmission includes first and second sheave halves disposed on a shaft, one of which is movable along the shaft relative to the other sheave half. Three moon gears are disposed on a rotatable shaft attached to a first sled that moves along a slot defined in a sheave halve. An input shaft with a control gear is connected to the sheave halves. Three threaded shafts are provided, that each include a worm gear. The worm gear engages an index gear of a respective rotatable shaft on which a respective one of the moon gears is mounted, and each threaded shaft including a threaded shaft drive gear that engages the control gear. A shift controller is coupled to the input shaft and threaded shaft drive gears, and creates a difference in rotational speed between the input shaft and the threaded shaft drive gear.
F16H 1/30 - Toothed gearings for conveying rotary motion with gears having orbital motion in which an orbital gear has an axis crossing the main axis of the gearing and has helical teeth or is a worm
F16H 3/12 - Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously- meshing gears, that can be disengaged from their shafts with means for synchronisation not incorporated in the clutches
F16H 3/38 - Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially using gears that can be moved out of gear with synchro-meshing
F16H 3/78 - Special adaptation of synchronisation mechanisms to these gearings
F16H 35/06 - Gearings designed to allow relative movement between supports thereof without ill effects
F16H 37/04 - Combinations of toothed gearings only
F16H 55/56 - Pulleys or friction discs of adjustable construction of which the bearing parts are relatively axially adjustable
In one example, a transmission is provided that includes a sheave of selectively variable configuration, a driven member configured to engage the sheave, and a plurality of drive members configured for radial movement to selectively engage the driven member. The transmission may be operable in one or more of the following modes: traction mode, integer mode, IN mode, and infinite mode.
Transmission systems, assemblies, and components are described. In particular, aspects of the present disclosure relate to an infinitely variable transmission that maintains constant tooth engagement during changes in gear ratio. In one aspect, a transmission includes an axially movable sheave coupled to a chain. The sheave rotates around a drive axis. At least partially within the sheave is a set of moon gears. The moon gears orbit around the drive axis and are rotable around respective internal axis. As the sheave moves axially, the chain and the set of moon gears move radially to define different gear ratios, with the gear ratios being changeable in infinitely small increments. A synchronization system moves the set of moon gears radially to correspond to the axial position of the sheave. A correction system optionally controls rotation of the moon gears to rotate teeth of the moon gears into alignment with the chain.
F16H 37/02 - Combinations of mechanical gearings, not provided for in groups comprising essentially only toothed or friction gearings
F16H 9/12 - Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion using belts, V-belts, or ropes engaging a pulley built-up out of relatively axially-adjustable parts in which the belt engages the opposite flanges of the pulley directly without interposed belt-supporting members
5.
INFINITELY VARIABLE TRANSMISSION WITH HYBRID ACCELERATOR
Disclosed are systems, assemblies, and components that relate to power transfer. In particular, the disclosed systems includes a transmission that offers variable speeds and changes between different gear ratios while maintaining constant engagement. Constant engagement may be maintained by tooth-to-tooth contact to be scalable for a variety of applications. An example system includes a phase shifting mechanism. The phase shifting mechanism may include an eccentric gear that provides an oscillating output. The oscillating output creates an overall gear ratio change that slides between gear ratios, thereby allowing changes to occur in small, and possibly infinitely small increments. According to one example, an eccentric gear has a changing base radius and includes a tooth with a hybrid profile that has a base the width of an initial profile, and a width at a top of the tooth that is that of a final profile.
F16H 3/76 - Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having orbital motion with an orbital gear having teeth formed or arranged for obtaining multiple gear ratios, e.g. nearly infinitely variable
F16H 3/44 - Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having orbital motion
6.
POSITIVE DISPLACEMENT VARIABLE SPEED TRANSMISSION WITH DUAL MOTION DRIVE GEARS
The present invention relates to transmission systems and changing gear ratios within power transmission systems. In particular, the present invention relates to a positive displacement variable speed transmission. The transmission includes one or more drive gears which orbit, rotate, and which translate radially to change the size of the orbital path. The change in the orbital path increases or decreases the linear velocity of the drive gears which engage one or more driven gears and transfer the changed linear velocity in the form of a gear ratio change. The driven gears are also radially movable and movement of the driven gears is synchronized with the radial movement of the drive gears to maintain substantially constant engagement between gear ratios change. Thus, as the drive and driven gears can slide or step radially to any location within a range of positions, gear ratio changes can be made in very small increments.
F16H 37/16 - Gearings comprising primarily toothed or friction gearing, links or levers, and cams, or members of at least two of these three types with a driving or driven member which both rotates or oscillates on its axis and reciprocates
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