An input cam having a recessed track for establishing a desired dwell time for a plurality of rotatable permanent magnets and an output cam having a recessed track for maximizing the harnessing of linear motion energy and to apply the harnessed energy to a rotary output are provided to improve the efficiency of a magnetic transmission.

Linear drive, in particular for converting a rotational movement into a linear movement for actuating a valve including a shut-off slide, having a crank mechanism, the linear drive comprising a first crankshaft associated with a piston rod via a first connecting rod, a second crankshaft associated with the piston rod via a second connecting rod, and a planetary gear for rotationally driving the first crankshaft and the second crankshaft.

A state changing unit is provided radially outward of a translation portion and movable in an axial direction relative to the translation portion. The state changing unit is in contact with or separated from the clutch. The state changing unit receives a force in the axial direction from the translation portion such that the state changing unit is pressed against the clutch. The state changing unit is capable of changing a state of the clutch to an engaged state or a disengaged state according to a position of the translation portion in the axial direction relative to the housing. A movement restriction portion is provided on the translation portion and located between the state changing unit and the clutch. The movement restriction portion contacts the state changing unit and restricts movement of the state changing unit relative to the translation portion toward the clutch.

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.

A prime mover includes a stator fixed to a housing, and a rotor rotatable relative to the stator. The prime mover outputs torque from the rotor by being supplied with electric power. A speed reducer reduces the torque of the prime mover and outputs the reduced torque. The speed reducer includes a sun gear to which the torque from the rotor is input, and a planetary gear that revolves in a circumferential direction of the sun gear while rotating in a state of meshing with the sun gear. The rotor and the sun gear are formed separately, and are disposed coaxially so as to be integrally rotatable.

A sun gear of a speed reducer is provided coaxially with and integrally rotatably with a rotor of a prime mover. Multiple planetary gears are disposed in a circumferential direction of the sun gear, and are capable of revolving in the circumferential direction of the sun gear while rotating in a state of meshing with the sun gear. A carrier rotatably supports the planetary gears, and is rotatable relative to the sun gear. A first ring gear is fixed to a housing, and has a first ring gear tooth portion capable of meshing with the planetary gears. A second ring gear is rotatable integrally with a rotation portion, and has a second ring gear tooth portion capable of meshing with the planetary gears. The second ring gear tooth portion is different in number of teeth from the first ring gear tooth portion.

A rotational translation unit includes a rotation portion that rotates relative to a housing upon receiving an input of torque output from a speed reducer, and a translation portion that moves relative to the housing in an axial direction according to rotation of the rotation portion relative to the housing. A clutch is provided between a first transmission portion and a second transmission portion that are rotatable relative to the housing, and the clutch allows transmission of the torque between the first transmission portion and the second transmission portion in an engaged state of the clutch, and interrupts the transmission of the torque between the first transmission portion and the second transmission portion in a disengaged state of the clutch. A return spring is capable of urging the rotational translation unit in a direction away from the clutch relative to the housing.

An axial-rotation locking-mechanism assembly includes a handle, a locking assembly, and a shaft. The locking assembly includes a locking element and a cam mechanism. The shaft is operatively connected to the handle and the locking assembly. When the handle is rotated in a first direction, the shaft is rotated in a first direction and drives the cam mechanism to move the locking element in a first axial direction. When the handle is rotated in a second direction, the shaft is rotated in a second direction and drives the cam mechanism to move the locking element in a second axial direction. The second direction is the opposite of the first direction. The first axial direction is the opposite of the second direction.

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.