Ballnut lubrication
AssigneeGoodrich Actuation Systems Limited
InventorMichael SOMERFIELD
Life of this patent
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Abstract
A ballscrew assembly comprises: a nut having a nut body with a radially inner surface and a helical groove formed on the radially inner surface; a screw shaft disposed within the nut, the screw shaft comprising a radially outer surface and a groove formed on the outer surface, the groove on the screw shaft cooperating with the groove on the nut to define a helical raceway for a plurality of balls; at least one lubricant reservoir formed in the nut body at or adjacent to an end of the helical raceway; and a lubricant passage extending through the nut body and fluidly coupled to the at least one lubricant reservoir; wherein the lubricant reservoir is fluidly linked to the helical groove of the nut via the lubricant passage.
Claims17
A ballscrew assembly comprising:
- a nut having a nut body with a radially inner surface and a helical groove formed on the radially inner surface;
- a screw shaft disposed within the nut, the screw shaft comprising a radially outer surface and a groove formed on the outer surface, the groove on the screw shaft cooperating with the groove on the nut to define a helical raceway for a plurality of balls;
- at least one lubricant reservoir formed in the nut body at or adjacent to an end of the helical raceway;
- and
- a lubricant passage extending through the nut body and fluidly coupled to the at least one lubricant reservoir;
- wherein the lubricant reservoir is fluidly linked to the helical groove of the nut via the lubricant passage.
Dependencies are inferred from the claim text.