Ball Screw Unit with Lubrication Apparatus
AssigneeHiwin Technologies Corp.
InventorsZong-Sian JIANG, Edward Hsu
Life of this patent
Estimating the term…
Abstract
A lubrication apparatus for the ball screw unit in which the grease state lubricant is used. There is formed a helical guide track in the lubrication apparatus. When the ball screw unit operates, a guide member rotates with the bolt, the grease stored in the guide track will flow ahead to the front terminal of the guide track and ooze out of the grease outlet to lubricate the bolt with the aid of a pressure produced due to the inertia of the flowing fluid, and the quantity of the oozed grease is determined by the size of the grease outlet. The lubrication of the ball screw unit can be performed automatically without relying on the external force.
Claims16
A ball screw unit with lubrication apparatus, comprising:
- a screw bolt having a helical rolling groove surrounding along an exterior surface thereof, and a guide groove;
- a nut having a central drilled hole, and a rolling ditch corresponding to said rolling groove of said bolt formed along an interior surface thereof;
- wherein said rolling groove and said rolling ditch are coupled to form a load passage;
- a plurality of rolling balls rolling along said load passage;
- a turning wicket formed on said nut for said balls to turn around and circulate;
- and
- a lubrication apparatus including an enclosure secured to the end portion of said nut movable in an axial direction with said nut, and a guide member;
- wherein said enclosure has a containment hole to accommodate said guide member, said guide member has a second through hole and a helical cavity, said second through hole allows said bolt to pass through and has a detent part formed on the interior surface thereof that being engaged with said guide groove, a helical slot is formed in said helical cavity, a grease outlet is provided at the end of said helical slot, and said helical slot and said containment hole of said enclosure forms a helical guide track.
A ball screw unit with lubrication apparatus, comprising:
- a screw bolt having a helical rolling groove surrounding along an exterior surface thereof, and a guide groove;
- a nut having a central drilled hole, and rolling ditch corresponding to said rolling groove of said bolt formed along an interior surface thereof;
- wherein said rolling groove and said rolling ditch are coupled to form a load passage;
- a plurality of rolling balls rolling along said load passage;
- a turning wicket formed in said nut for said balls to turn around and circulate;
- and
- a lubrication apparatus including an enclosure, a guide member and a lid, wherein said enclosure is secured to the end of said nut, and movable in the axial direction with said nut, said enclosure further has a containment hole to accommodate said guide member which has a second through hole and a helical cavity, said second through hole allows said bolt to pass through and provided with a detent part in an interior surface thereof in engagement with said guide groove, a helical slot with a grease outlet at an end thereof is formed in said helical cavity, said helical slot and said containment hole forms a helical guide track, said lid covers on the end of said enclosure and is formed with a third through hole to allow said bolt to pass through.
A lubrication apparatus comprising:
- an enclosure secured to the end portion of said nut movable in an axial direction with said nut, and a guide member;
- wherein said enclosure has a containment hole to accommodate said guide member, said guide member has a second through hole and a helical cavity, said second through hole allows said bolt to pass through and has a detent part formed on the interior surface thereof that being engaged with said guide groove, a helical slot is formed in said helical cavity, a grease outlet is provided at the end of said helical slot, and said helical slot and said containment hole of said enclosure form a helical guide track.
Dependencies are inferred from the claim text.