A flywheel coupling assembly for transmitting torque between a shaft and a flywheel includes a clamp ring assembly and a flywheel attachment flange assembly. The clamp ring assembly includes a first clamp ring adapted to be coupled to the shaft, a second clamp ring coupled to a coupling hub of the flywheel attachment flange assembly, and an elastomeric center element coupling the first and second clamp rings. A planer plate element of the flywheel attachment flange assembly is adapted to be coupled with the flywheel. Also disclosed are a method of forming a flywheel coupling assembly and a method of coupling a flywheel to a shaft.

A bicycle transmission device for connecting to a freehub body on a rear wheel, which has convex keys arranged radially on the periphery. The bicycle transmission device includes a connecting member, a fastener, and a cogset assembly. The connecting member includes a cylindrical body portion, connection keys protruding from a periphery of the body portion, a cut groove passing through the body portion, and first and second connecting seats located on two sides of the cut groove. The inner wall of the body portion has concave grooves corresponding to the convex keys. The fastener is adapted to be connected to the connecting seats and to pull them together. The cogset assembly includes a cogset seat and sprockets. The cogset seat has a first socket hole fitting around the connecting member and connection grooves corresponding to and adapted to be connected to the connection keys. The sprockets with different numbers of chain teeth are adapted to be connected to the cogset seat.

A working machine assembly has a rotatable shaft and a power transmission device having a central hub with a bore there through configured to receive the rotatable shaft. The shaft and power transmission device are connected with a securing mechanism that includes a key inserted in a keyway formed in an inner surface of the central hub and a key seat formed along a portion of the shaft wherein the key prevents relative movement between the rotatable shaft and the attached power transmission device. The securing mechanism has a pin having a flat tapered surface. The pin is received in a cross hole in the hub and interacts with the key such that the tapered surface abuts the key. The pin has a threaded end. A nut is received on the threaded end and used to draw the tapered surface of the pin against the key in a wedging action.

In an assembly for connecting an adapter shaft to a shaft in a force-fitting manner using a clamping ring, the clamping ring is mounted on the adapter shaft, the shaft is inserted into the adapter shaft, the clamping ring has a first radially uninterrupted threaded bore into which a first screw part is screwed, in particular a first threaded pin, which exerts pressure on the adapter shaft, the clamping ring has a second radially uninterrupted threaded bore into which a second screw part is screwed, in particular a second threaded pin, and the second screw part projects at least partially into a recess of the adapter shaft and in particular exerts pressure on the adapter shaft.

In an assembly for connecting an adapter shaft to a shaft in a force-fitting manner using a clamping ring, the clamping ring is mounted on the adapter shaft, the shaft is inserted into the adapter shaft, the clamping ring has a radially uninterrupted threaded bore, into which a screw part is screwed, in particular a threaded pin, which exerts pressure on the adapter shaft. A cylinder bolt is accommodated in a first, in particular radially directed, recess of the clamping ring, which projects radially inward into a second, in particular radially directed, recess introduced into the adapter shaft, in particular projects into it, especially in order to form a protection against loss and an anti-rotation protection acting in the axial direction and in the circumferential direction.

A drive hub includes a body and lugs that extend radially from the body and are engageable with a primemover of a primary power source. The lugs have a fastening lug that includes a radially extending bore. A hybrid, single piece setscrew extends within the bore and has a hemispherical portion configured to apply pressure to engage the drive hub to a shaft of a secondary power source.

A shaft coupling for connecting an upper shaft with a lower shaft within a pumping system is designed to handle a large tensile load between the upper and lower shafts. In some embodiments, the upper shaft includes a shaft ring groove and the coupling has a body and a first receiving chamber within the body that receives an end of the upper shaft. The coupling also includes an upper internal groove extending into the body from the first receiving chamber and an upper split ring that is configured to be compressed into a position occupying both the upper internal groove and the shaft ring groove of the upper shaft. Set screws compress the upper split ring into the shaft ring groove of the upper shaft. In another embodiment, the coupling includes a plurality of locking screws that extend through the body into corresponding lock screw grooves in the upper and lower shafts.

A connecting device for a chainring of a bicycle is disclosed, including a connecting disc, a shaft, and a crank. The connecting disc is adapted to be engaged with a chainring, and has an axial bore, a bulging portion bulging from a central portion of the connecting disc, and a surrounding portion, which is flat, and surrounds an outer periphery of the bulging portion. The shaft passes through the axial bore to be fixedly engaged with the connecting disc. The shaft has a connecting end. The crank has a connecting end engaged with the connecting end of the shaft, and a bearing end adapted to bear an external force to make the crank rotate around the shaft. Whereby, the amount of materials used to make the connecting device is decreased. At the same time, the manufacturing cost, the size, and the weight of the connecting device are all reduced.

A drive shaft is for selectively connecting a drive input to an output. The drive shaft has a tubular portion, a first diaphragm member, and a second diaphragm member displaced axially along the shaft from the first diaphragm member. The first and second diaphragm members each are formed with two axial ends. At least one undulation extends radially of the ends. The tubular portion connects the first and second diaphragm members. The first and second diaphragm members and the tubular portion are formed of fiber-reinforced polymer matrix composites. The first and second diaphragm members are connected to first and second axial ends of the tubular portion through a mechanical connection at joints. There is also a method of forming a drive shaft.

The present invention provides a rigid modular holding with axial and radial compensation for multiple and universal application of all machining processes, engineering, machine building, and construction fields where ever applicable for rotary and static systems. Design of modular holding includes male and female portions (401,301) of joining parts machined to the required shape and clearances to accommodate modular locking rigidly with face butting (407, 308). Radial and axial run out adjustments is controlled by the grub screws (307, 306) and run out compensation can be achieved within micron. An Area used for clamping and designed within the area of joining parts results reduction in material and processing cost. Since, the material is not protruding out from the surface of the joining parts, esthetically looks good and convenient for designing multiple applications as it is not possible at present.