Linear drive unit
First Claim
1. A linear drive unit, comprising:
- a housing (14);
a screw drive having an axis and being disposed generally within the housing, the screw drive comprising a threaded rod (1) in meshing engagement with a threaded nut (2);
a cog ring forming a unit with the threaded nut (2) or rod (1), centered on the axis and comprising a number of projecting cogs equally spaced along a circumference thereof, rotation of the cog ring about the axis causing a relative axial translation between the rod and the nut; and
a connecting link (4, 5) extending axially parallel to the axis of the threaded rod, the connecting link being movable to and fro in an axial direction, to rotate the cog ring in increments;
wherein an incremental axial shifting of the threaded rod (1) or nut (2) relative to the housing occurs.
2 Assignments
0 Petitions
Accused Products
Abstract
A linear drive unit has a threaded rod, and in combing engagement with same a threaded nut (2), from the outer circumference of which a number of equally spaced cogs (3) project in a radial direction. Furthermore, connecting links (4, 5), which extend parallel to the axis of the threaded rod inside a housing, are driven via hydraulically or pneumatically actuated pistons, causing the connecting links (4, 5) to move in an axial direction. During this oscillating movement the connecting links act upon cogs (3) that project from the threaded nut (2). The force exerted via the cogs (3) located on the outer circumference of the threaded nut (2) causes the threaded nut (2) to be put into an incremental rotation, which, in turn, causes an incremental linear shifting of the threaded rod (1).
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Citations
11 Claims
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1. A linear drive unit, comprising:
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a housing (14);
a screw drive having an axis and being disposed generally within the housing, the screw drive comprising a threaded rod (1) in meshing engagement with a threaded nut (2);
a cog ring forming a unit with the threaded nut (2) or rod (1), centered on the axis and comprising a number of projecting cogs equally spaced along a circumference thereof, rotation of the cog ring about the axis causing a relative axial translation between the rod and the nut; and
a connecting link (4, 5) extending axially parallel to the axis of the threaded rod, the connecting link being movable to and fro in an axial direction, to rotate the cog ring in increments;
wherein an incremental axial shifting of the threaded rod (1) or nut (2) relative to the housing occurs. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification