A method of case hardening toothed gearing using low (LH) or specified hardness (SH) steel and using through surface hardening (TSH) in order to create a described case hardening pattern which increases the fatigue strength of the gear tooth.

A method of case hardening toothed gearing using low (LH) or specified hardness (SH) steel and using through surface hardening (TSH) in order to create a described case hardening pattern which increases the fatigue strength of the gear tooth.

A differential assembly is disclosed herein. The differential assembly includes a case, a weld ring and a ring gear. The ring gear and case may comprise dissimilar materials. The case may be overmolded onto the weld ring. The weld ring may be welded to the ring gear such that the ring gear is attached to the case.

A differential assembly is disclosed herein. The differential assembly includes a case, a weld ring and a ring gear. The ring gear and case may comprise dissimilar materials. The case may be overmolded onto the weld ring. The weld ring may be welded to the ring gear such that the ring gear is attached to the case.

A speed reducing mechanism according to one embodiment of the disclosure includes a case, internal tooth pins, an oscillating gear meshing with the internal tooth pins, an input crankshaft transmitting a rotational force to the oscillating gear, and an output shaft to which a rotational force of the oscillating gear is transmitted. One of the shafts at least partially has a shaft-side high thermal conductivity portion that extends over the entire axial length of the shaft and has a thermal conductivity higher than the thermal conductivity of the oscillating gear.

A speed reducing mechanism according to one embodiment of the disclosure includes a case, internal tooth pins, an oscillating gear meshing with the internal tooth pins, an input crankshaft transmitting a rotational force to the oscillating gear, and an output shaft to which a rotational force of the oscillating gear is transmitted. One of the shafts at least partially has a shaft-side high thermal conductivity portion that extends over the entire axial length of the shaft and has a thermal conductivity higher than the thermal conductivity of the oscillating gear.

Gear pairing of a transmission with a first gear and with a second gear engaged with the first gear, whereby the first gear, in comparison to the second gear, is manufactured from a material that is less elastic or less soft, and whereby the first gear and the second gear have different normal target base pitches.

Gear pairing of a transmission with a first gear and with a second gear engaged with the first gear, whereby the first gear, in comparison to the second gear, is manufactured from a material that is less elastic or less soft, and whereby the first gear and the second gear have different normal target base pitches.

Methods for the fabrication of metal strain wave gear flexsplines using a specialized metal additive manufacturing technique are provided. The method allows the entire flexspline to be metal printed, including all the components: the output surface with mating features, the thin wall of the cup, and the teeth integral to the flexspline. The flexspline may be used directly upon removal from the building tray.

Methods for the fabrication of metal strain wave gear flexsplines using a specialized metal additive manufacturing technique are provided. The method allows the entire flexspline to be metal printed, including all the components: the output surface with mating features, the thin wall of the cup, and the teeth integral to the flexspline. The flexspline may be used directly upon removal from the building tray.