Roller screw mechanism with integrated ring gears and associated manufacturing method
AssigneeAktiebolaget Skf
InventorsFolly Abevi, Christian Boch
Life of this patent
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Abstract
A roller screw mechanism comprising a screw having an outer thread, a nut disposed around and coaxially with the screw. The nut includes an inner thread. A plurality of rollers are disposed radially between the screw and the nut and are each provided with an outer thread engaged with the outer and inner threads of the screw and of the nut and with two outer gear teeth. The mechanism additionally comprises two synchronizing gear teeth that are formed on the nut and are each engaged with one of the gear teeth of the rollers. The root diameter of each gear teeth is less than the inside diameter of the inner thread of the nut.
Claims8
A roller screw mechanism comprising:
- a screw having an outer thread;
- a nut disposed coaxially around the screw, the nut comprising an inner thread, and
- a plurality of rollers disposed radially between the screw and the nut and having an outer thread engaged with the outer thread of the screw and with the inner thread of the nut and having two sets of outer gear teeth;
- and
- two sets of synchronizing gear teeth formed on the nut, each of the two sets of synchronizing gear teeth being engaged with one of the two sets of outer gear teeth of the rollers,
- wherein a root diameter of each set of synchronizing gear teeth is less than an inside diameter of the inner thread of the nut, and wherein the nut is unitary and includes an inner surface and wherein the inner thread is formed in the inner surface and wherein the two sets of outer gear teeth of the plurality of the rollers do not engage the screw.
A roller screw mechanism comprising:
- a screw having an outer thread;
- a unitary nut disposed coaxially around the screw, the nut having an inner surface and an inner thread formed in the inner surface, and
- a plurality of rollers disposed radially between the screw and the nut, each of the plurality of rollers having an outer thread engaged with the outer thread of the screw and with the inner thread of the nut, each of the plurality of rollers further including a first set of outer gear teeth and a second set of outer gear teeth;
- and
- a first set of synchronizing gear teeth formed in the inner surface of the nut on a first side of the inner thread and a second set of synchronizing gear teeth formed in the inner surface of the nut on a second side of the inner thread, the first set of synchronizing gear teeth engaging the first set of outer gear teeth of the plurality of rollers and the second set of synchronizing gear teeth engaging the second set of outer gear teeth of the plurality of rollers,
- wherein a root diameter of the first and second sets of synchronizing gear teeth is less than an inside diameter of the inner thread of the nut, and,
- wherein the first and second sets of outer gear teeth of the plurality of the rollers do not engage the screw.
Dependencies are inferred from the claim text.