Spindle drive
First Claim
1. A spindle drive (100) havinga threaded bolt (10),a first load path which includes a first nut (20) which meshes with the threaded bolt (10),a second load path which includes a second nut (22) which meshes with the threaded bolt (10) and is arranged to be movable relative to the first nut (20) in an axial direction of the threaded bolt (10) in at least one state of the spindle drive (100),a sensor unit (30) configured to detect a relative movement between the first (20) nut and the second nut (22),a piston (60) configured to move upon the relative movement between the first and second nuts (20, 22), andan element (40) connected to the second nut (22) an having a groove, whereinthe sensor unit (30) includes an LVDT (linear variable displacement transducer) activated by the piston (60) to detect position of the piston (60), andthe piston (60) is arranged, in a normal operating state, in the groove of the element (40) connected to the second nut (22) and moves in event of a defect, in a radial direction relative to the second nut (22).
1 Assignment
0 Petitions
Accused Products
Abstract
A spindle drive has a first load path formed by a first nut which meshes with a threaded bolt and a second load path formed by a second nut which also meshes with the threaded bolt and is arranged to be movable relative to the first nut in an axial direction of the threaded bolt in at least one state of the spindle drive. A sensor unit detects relative movement between the first and second nuts.
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Citations
15 Claims
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1. A spindle drive (100) having
a threaded bolt (10), a first load path which includes a first nut (20) which meshes with the threaded bolt (10), a second load path which includes a second nut (22) which meshes with the threaded bolt (10) and is arranged to be movable relative to the first nut (20) in an axial direction of the threaded bolt (10) in at least one state of the spindle drive (100), a sensor unit (30) configured to detect a relative movement between the first (20) nut and the second nut (22), a piston (60) configured to move upon the relative movement between the first and second nuts (20, 22), and an element (40) connected to the second nut (22) an having a groove, wherein the sensor unit (30) includes an LVDT (linear variable displacement transducer) activated by the piston (60) to detect position of the piston (60), and the piston (60) is arranged, in a normal operating state, in the groove of the element (40) connected to the second nut (22) and moves in event of a defect, in a radial direction relative to the second nut (22).
Specification