One-piece recirculation part, recirculation threaded member and ballscrew mechanism

A recirculation threaded member for a ballscrew mechanism, the recirculation threaded member having a threading, the recirculation threaded member being equipped with one or more recirculators, each of the recirculators being housed in a housing cavity of the recirculation threaded member, the housing cavity passing through a thread of the threading, wherein each of the recirculators is a one-piece recirculation part having:

• a bottom, turned in a reference direction parallel to a reference axis of the recirculation part and bearing against a bottom of the housing cavity;
• a recirculation path turned in a direction opposite to the reference direction, interconnecting two portions of a groove in the thread on either side of the thread traversed by the housing cavity along a recirculation path;
• at least one first deflector, projecting from the recirculation path in the opposite direction to the reference direction, the first deflector forming a guide face, located at a distance from the recirculation path and facing in the reference direction;
• and
• at least one first lumen which opens out on a first end onto the bottom and on a second end onto the recirculation path, opposite the guide face, the first lumen having an orthogonal projection onto a reference plane perpendicular to the reference axis, which surrounds or coincides with an orthogonal projection of the guide face of the first deflector onto the reference plane.

A ballscrew mechanism comprising:

• two threaded members, namely a screw and a nut, and balls, one of the two threaded members being a recirculation threaded member having a threading, the recirculation threaded member being equipped with one or more recirculators, each of the recirculators being housed in a housing cavity of the recirculation threaded member, the housing cavity passing through a thread of the threading, wherein each of the recirculators is a one-piece recirculation part having:
• a bottom, turned in a reference direction parallel to a reference axis of the recirculation part and bearing against a bottom of the housing cavity;
• a recirculation path turned in a direction opposite to the reference direction, interconnecting two portions of a groove in the thread on either side of the thread traversed by the housing cavity along a recirculation path;
• at least one first deflector, projecting from the recirculation path in the opposite direction to the reference direction, the first deflector forming a guide face, located at a distance from the recirculation path and facing in the reference direction;
• and
• at least one first lumen which opens out on a first end onto the bottom and on a second end onto the recirculation path, opposite the guide face, the first lumen having an orthogonal projection onto a reference plane perpendicular to the reference axis, which surrounds or coincides with an orthogonal projection of the guide face of the first deflector onto the reference plane,
• the ballscrew mechanism further comprising balls forming one or more lines of balls, each associated with one of the one-piece recirculation parts, and each arranged along a loop path passing through the recirculation path of an associated one-piece recirculation part and through the two portions of the thread groove on either side of the thread through which the housing cavity passes.