Speed changing device
AssigneeINA Walzlager Schaeffler KG
InventorJoachim Schneider
Life of this patent
Estimating the term…
Abstract
A speed changing device for a gear box, particularly for a toothed change speed gear of a motor vehicle in which a gear wheel, freely rotatable on a driven shaft can be coupled with the driven shaft by means of an axially displaceable claw ring and a toothed bushing, the claw ring being axially displaceable by an electric driving device via a gearshift fork, arranged on a selector shaft which is parallel to the driven shaft, characterized in that the gearshift fork is axially displacable on the associated stationary selector shaft by a spindle drive comprising an externally threaded section arranged on the selector shaft and an internally threaded section, the axes of both threaded sections being arranged on the axis (D.sub.1), of the selector shaft and one of the threaded sections being actuatable by rotation by an electromotor.
Claims14
A speed changing device for a toothed change speed gear (1) of a motor vehicle in which a gearwheel (6) freely rotatable on a driven shaft (3) can be coupled with the driven shaft (3) by an axially displaceable claw ring (5) and a toothed bushing (8), the claw ring (5) being axially displaceable by a one-piece gearshift fork (12) which is actuated by an electric driving means and is arranged on a selector shaft (11) which extends parallel to the driven shaft (3), characterized in that the gearshift fork (12) is axially displaceable by a spindle drive (16) which radially surrounds only the associated unrotatable selector shaft (11), the spindle drive (16) comprises an externally threaded section (17) arranged on the selector shaft (11) and an internally threaded section (18), a longitudinal axis D1 of the selector shaft (11) coincides with longitudinal axes of the components carrying the externally and internally threaded sections, one of the externally threaded section and internally threaded section (17, 18) being actuatable by an electromotor (19) integrated and mounted in the gearshift fork (12).
Dependencies are inferred from the claim text.