Back to results
US 5,956,997 AGranted
Worm gear with a gear ring nut
AssigneeIna Walzlager Schaeffler oHG
InventorsJurgen Oetjen, Alexander Zernickel
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeIna Walzlager Schaeffler oHG
InventorsJurgen Oetjen, Alexander Zernickel
Estimating the term…
A worm gear for transforming a rotary motion into a reciprocating motion comprises a threaded spindle (2) which is mounted for rotation on at least one needle roller bearing (5) in a gear ring nut (22) which functions as a housing (21). A profiled gear ring (19) engages the thread of the spindle (2) at one peripheral point for axially displacing the gear ring nut (22). This gear ring (19) surrounds the threaded spindle (2) and is arranged eccentric to the spindle axis (3). Further, the gear ring (19) is surrounded by a radial rolling bearing on which the gear ring (19) is rotatably mounted in the housing (21). According to the invention, the housing (21) is composed of rotationally symmetrical sheet metal parts made by chipless deep drawing, the inner surfaces of which sheet metal parts directly comprise the outer rolling element raceways for the bearings. In this way, an easy-to-mount worm gear with a simplified structure is obtained.
A worm gear for transforming a rotary motion into a reciprocating (linear) motion, comprising a threaded spindle which is mounted for rotation on at least one needle roller bearing in a gear ring nut which functions as a housing, a profiled gear ring engaging a thread of the spindle at one peripheral point for axially displacing the gear ring nut, the gear ring which surrounds the threaded spindle being arranged eccentric to the spindle axis while being surrounded by a radial rolling bearing on which the gear ring is rotatably mounted in the housing, wherein the housing (4, 21, 25) is composed of rotationally symmetrical sheet metal parts made by chipless deep drawing, said sheet metal parts having inner surfaces which directly comprise outer rolling element raceways for said needle roller bearing and said radial rolling bearing.
Dependencies are inferred from the claim text.