The present invention relates to a linear drive (1), comprising a drive shaft (10) that can be rotated about a longitudinal axis (X), at least one propulsion element (20) having a propulsion tooth (21), a rack (30), and at least one guide means (40), wherein the at least one propulsion element (20) is coupled to the drive shaft (10) in such a way that the propulsion tooth (21) of said element is pressed into the rack (30) in a cyclical movement (21) during a rotation of the drive shaft (10) about the longitudinal axis (X) to generate an advance, and wherein, when the propulsion tooth (21) of the at least one propulsion element (20) is pressed into the rack (30), the at least one guide means (40) forms an abutment which counteracts the rack (30) for the at least one propulsion element (20). In addition, the present invention relates to a longitudinal adjustment unit and a motor vehicle.

The present invention relates to a linear drive (1), comprising a drive shaft (10) that can be rotated about a longitudinal axis (X), at least one propulsion element (20) having a propulsion tooth (21), a rack (30), and at least one guide means (40), wherein the at least one propulsion element (20) is coupled to the drive shaft (10) in such a way that the propulsion tooth (21) of said element is pressed into the rack (30) in a cyclical movement (21) during a rotation of the drive shaft (10) about the longitudinal axis (X) to generate an advance, and wherein, when the propulsion tooth (21) of the at least one propulsion element (20) is pressed into the rack (30), the at least one guide means (40) forms an abutment which counteracts the rack (30) for the at least one propulsion element (20). In addition, the present invention relates to a longitudinal adjustment unit and a motor vehicle.

In an actuator system having a toothed actuator and a tensioner to apply a tension force to the toothed actuator, a hold mechanism holds the tooth actuator stationary, through disengage-able contact with at least one tooth thereof, with respect to a direction of the tension force while allowing the tooth actuator to move freely in a direction opposite the direction of the tension force. An advancement pawl having at least two degrees of freedom engages with one or more teeth on the tooth actuator to displace the tooth actuator a distance in the direction opposite of the direction of the tension force.

The present invention relates to a linear drive (1), comprising a camshaft (10) having at least one camshaft disk (15) which is arranged in a longitudinal axis (X), at least one rack (30) comprising at least one tooth (31), and at least one propulsion element (20) having at least one propulsion tooth (21), wherein the at least one propulsion element (20) has a recess (25) with which the camshaft (10) engages, wherein the camshaft (10) is coupled to the at least one propulsion element (20) by means of the at least one camshaft disk (15), and wherein the propulsion element (20) can be pushed into and out of the rack (30) in order to generate a propulsion in the longitudinal axis (X) when the camshaft (10) rotates. In addition, the present invention relates to a longitudinal adjustment unit for a seat and to a motor vehicle having at least one longitudinal adjustment unit.

The present invention relates to a linear drive (1), comprising a drive shaft (10) arranged along a longitudinal axis (X), at least two propulsion teeth (20), and at least one rack (30) having a plurality of teeth (31), wherein the propulsion teeth (20) can move in a stroke transversely to the longitudinal axis (X) and are drivingly coupled to the drive shaft (10) in such a manner that the at least two propulsion teeth (20) perform at least one cyclical stroke movement (21) in the course of one rotation (φ) of the drive shaft (10) and enter and exit the at least one rack (30) to generate a propulsion in the longitudinal axis (X), and wherein the cyclical stroke movement (21) of the at least two propulsion teeth (20) takes place with a phase shift (Δφ). In addition, the present invention relates to a longitudinal adjustment unit and to a motor vehicle having such a longitudinal adjustment unit.

The present invention relates to a linear drive (1), comprising a drive shaft (10) arranged along a longitudinal axis (X), at least two propulsion teeth (20), and at least one rack (30) having a plurality of teeth (31), wherein the propulsion teeth (20) can move in a stroke transversely to the longitudinal axis (X) and are drivingly coupled to the drive shaft (10) in such a manner that the at least two propulsion teeth (20) perform at least one cyclical stroke movement (21) in the course of one rotation (φ) of the drive shaft (10) and enter and exit the at least one rack (30) to generate a propulsion in the longitudinal axis (X), and wherein the cyclical stroke movement (21) of the at least two propulsion teeth (20) takes place with a phase shift (4). In addition, the present invention relates to a longitudinal adjustment unit and to a motor vehicle having such a longitudinal adjustment unit.

The present invention relates to a linear drive (1) having a drive shaft (10) along a longitudinal axis (X), at least two propelling teeth (20), and at least one gear rack (30) comprising a plurality of teeth (31), wherein the propelling teeth (20) are reciprocatingly movable perpendicularly to the longitudinal axis (X) and are drivingly connected to the drive shaft (10) such that said at least two propelling teeth (20) carry out at least one cyclical reciprocating movement (21) during the course of one rotation (φ) of the drive shaft (10), dipping into and out of the at least one gear rack (30) in order to produce propelling motion along the longitudinal axis (X), and wherein the cyclical reciprocating movement (21) of the at least two propelling teeth (20) have phase shifts (Δφ). Furthermore, the present invention relates to a longitudinal-adjustment unit as well as to a motor vehicle coprising such a longitudinal-adjustment unit.

The present invention relates to a linear drive (1), comprising a camshaft (10) having at least one camshaft disk (15) which is arranged in a longitudinal axis (X), at least one rack (30) comprising at least one tooth (31), and at least one propulsion element (20) having at least one propulsion tooth (21), wherein the at least one propulsion element (20) has a recess (25) with which the camshaft (10) engages, wherein the camshaft (10) is coupled to the at least one propulsion element (20) by means of the at least one camshaft disk (15), and wherein the propulsion element (20) can be pushed into and out of the rack (30) in order to generate a propulsion in the longitudinal axis (X) when the camshaft (10) rotates. In addition, the present invention relates to a longitudinal adjustment unit for a seat and to a motor vehicle having at least one longitudinal adjustment unit.

The present invention relates to a linear drive (1) having a drive shaft (10) along a longitudinal axis (X), at least two propelling teeth (20), and at least one gear rack (30) comprising a plurality of teeth (31), wherein the propelling teeth (20) are reciprocatingly movable perpendicularly to the longitudinal axis (X) and are drivingly connected to the drive shaft (10) such that said at least two propelling teeth (20) carry out at least one cyclical reciprocating movement (21) during the course of one rotation () of the drive shaft (10), dipping into and out of the at least one gear rack (30) in order to produce propelling motion along the longitudinal axis (X), and wherein the cyclical reciprocating movement (21) of the at least two propelling teeth (20) have phase shifts (). Furthermore, the present invention relates to a longitudinal-adjustment unit as well as to a motor vehicle coprising such a longitudinal-adjustment unit.

In this mechanism, the linear or rotational motion is transmitted from one side to the other in only one direction, while its reverse motion and both other side motion directions can run freely without transmission. To obtain this function of transmitting the motion between both sides in different natures, the link that transmits the motion should be linked with a body which is not controlled by the in-between relative motion. The driving side can oscillate in short strokes or move with unlimited motion, both motion natures can have its own transmission mechanism design. Links could be used in pairs for force balance. One of the ways to transmit the motion from the driving side to the links is by using a waving surface to push and release the link. These waves can be formed in number which is different from the number of link pairs in order to ensure different phases and hence insure contacts of some of them for high and stable transmitted forces and torques. The motion transmission from the link and the motion output body could be through biting, friction or positive engagement in teethed surfaces.