Spindle gear
AssigneeIgus GmbH
InventorsStefan Niermann, Sebastian Polle
Life of this patent
Estimating the term…
Abstract
In a spindle gear mechanism (1) having a spindle component (2) with a spindle thread (21) which has a pitch which alters over a longitudinal axis of the spindle component (2), and having a threaded component (3) which engages in the spindle thread (21), wherein the two components (2; 3) can be displaced relative to one another in relation to the longitudinal axis (1) of the spindle component (2), provision is made, for the purpose of straightforward production capability and suitability for a large number of applications, for the threaded component (3) to have at least one freely movable threaded element (4) which engages in the spindle thread (21) and, during operation, adapts automatically to the pitch of the spindle thread (21).
Claims18
A spindle gear (1) comprising:
- a spindle component (2) with a spindle thread (21) having a pitch which varies over a longitudinal axis (l) of the spindle component (2);
- and
- a thread component (3) which engages into the spindle thread (3), and
- wherein the two components (2, 3) are displaceable relative to each other with respect to the longitudinal axis (l) of the spindle component (2), and
- the thread component (3) includes at least one freely moveable thread element (4) which engages into the spindle thread (21) and in operation automatically adapts to the thread pitch of the spindle thread (21);
- the thread element (4) includes a thread portion (41) that with respect to the longitudinal axis (l) of the spindle component (2) respectively engages into the spindle thread (21) in the working position in force-transmitting relationship, in the installation position the thread portion (41) is arranged at the side of a base (42) of the thread element (4) which faces the spindle thread (21), and the thread portion (41) is of a linear configuration or extends in an arcuate configuration in the peripheral direction with respect to the longitudinal axis of the spindle component (2);
- the thread component (3) further includes a body (5) with a receiving opening (51), designed radially as a through opening with respect to the longitudinal axis (l) of the spindle component (2) and aligned along an opening axis (ö), in which the thread element (4) is arranged by way of its base (42) mounted plain-bearing rotatably movably or rolling-bearing rotatably movably with respect to the opening axis (ö) of the receiving opening (51).
A spindle gear (1) comprising:
- a spindle component (2) with a spindle thread (21) having a pitch which varies over a longitudinal axis (l) of the spindle component (2);
- and
- a thread component (3) which engages into the spindle thread (3), the thread component (3) has at least one freely moveable thread element (4) which engages into the spindle thread (21) and in operation automatically adapts to the thread pitch of the spindle thread (21), the at least one thread element (4) has a thread portion (41) which with respect to the longitudinal axis (l) of the spindle component (2) respectively engages into the spindle thread (21) in the working position in a force-transmitting relationship, and
- wherein the two components (2, 3) are displaceable relative to each other with respect to the longitudinal axis (l) of the spindle component (2);
- and
- wherein to the outside contour of the thread portion (41) which is towards the spindle component (2) and which is peripheral with respect to the thread element (1) is of a concave and also elliptical or approximately elliptical configuration adapted to a pitch of the spindle thread (21).
Dependencies are inferred from the claim text.