Threaded nut of a ball screw and method for producing same
AssigneeSchaeffler Technologies AG & Co. KG
InventorsMario Kreutzer, Richard Baier, Claus Pfeffer, Thomas Kandler
Life of this patent
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Abstract
The disclosure relates to a threaded nut of a ball screw, the threaded nut having an inner sleeve made of sheet metal and an outer sleeve made of sheet metal, which are nested axially in one another to form a nut sleeve. The nut sleeve is provided with a thread, which is formed helically about a longitudinal axis of the threaded nut and which forms, on the inner circumference of the nut sleeve, a ball groove wound helically about the longitudinal axis of the threaded nut and, and on the outer circumference of the nut sleeve, a helically wound outer ridge.
Claims20
A threaded nut of a ball screw, the threaded nut comprising:
- an inner sleeve constructed of sheet metal, and
- an outer sleeve constructed of sheet metal, the inner sleeve and the outer sleeve separately nested axially in one another to form a nut sleeve having a thread, the thread formed helically about a longitudinal axis of the threaded nut and forming:
- i) on an inner circumference of the nut sleeve, a ball groove wound helically about the longitudinal axis of the threaded nut and, ii) on an outer circumference of the nut sleeve, a helically wound outer ridge, such that the inner sleeve is threadedly engaged with the outer sleeve via the forming of the ball groove and the helically wound outer ridge so as to axially join the separately nested inner sleeve and the outer sleeve.
A threaded nut of a ball screw, the threaded nut comprising:
- a longitudinal axis,
- an outer sleeve constructed of sheet steel, the outer sleeve having:
- an outer circumference formed with an outer ridge extending helically about the longitudinal axis, and
- an inner circumference formed with a groove extending helically about the longitudinal axis,
- an inner sleeve constructed of sheet steel and separately disposed within the outer sleeve to form a nut sleeve, the inner sleeve having:
- an inner circumference formed with a ball groove extending helically about the longitudinal axis, and
- an outer circumference formed with an inner ridge extending helically about the longitudinal axis, the inner ridge threadedly engaging the groove formed on the inner circumference of the outer sleeve so as to axially join the separately disposed inner sleeve within the outer sleeve.
A method for producing a threaded nut, the method comprising:
- providing an outer sleeve constructed of sheet metal,
- providing an inner sleeve constructed of sheet metal,
- inserting the inner sleeve within the outer sleeve to form a nut sleeve,
- inserting the nut sleeve into a die,
- moving a forming tool into the nut sleeve so as to simultaneously form:
- i) a helically wound ball groove on an inner circumference of the inner sleeve, ii) a helically wound inner ridge on an outer circumference of the inner sleeve, iii) a helically wound groove on an inner circumference of the outer sleeve, the helically wound groove engaged with the helically wound inner ridge, and iv) a helically wound outer ridge on an outer circumference of the outer sleeve, the outer ridge formed via grooves arranged on the die.
Dependencies are inferred from the claim text.