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US 2020/0200245 A1Published application
Ball Screw Drive With Variable Spring Stiffness
AssigneeSchaeffler Technologies AG & Co. KG
InventorMichael Zinnecker
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Abstract
Ball screw drives are disclosed. The ball screw may include a spindle having a threaded portion; a nut having a threaded portion, the threaded portions of the spindle and the nut together forming a ball channel; and a plurality of balls disposed in the ball channel to form a ball chain. Two or more intermediate springs may be disposed within the ball chain, each intermediate spring disposed between two balls in the ball chain. At least two of the two or more intermediate springs may have a different spring stiffness.
Claims9
A ball screw, comprising:
- a spindle having a threaded portion;
- a nut having a threaded portion, the threaded portions of the spindle and the nut together forming a ball channel;
- a plurality of balls disposed in the ball channel to form a ball chain;
- and
- two or more intermediate springs disposed within the ball chain, each intermediate spring disposed between two balls in the ball chain;
- wherein at least two of the two or more intermediate springs have a different spring stiffness.
3 more elements
Dependencies are inferred from the claim text.