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 disclosure relates to a robot cleaner, and more particularly, to a robot cleaner that replaces a battery charged in a charging base and a discharged battery of the cleaning robot simply by using power of a cleaning robot of the robot cleaner. According to the present disclosure, the cleaning robot of the robot cleaner may include at least two driving wheels, and the charging base may include a replacement unit mechanically connected to one of the driving wheel to replace batteries and a docking unit mechanically connected to the other of the driving wheel to dock the cleaning robot. Therefore, as the cleaning robot and the charging base are mechanically connected, there is an effect of exchanging batteries only by using a control unit and the driving motor of the cleaning robot.

With respect to a linear motion shaft in which a rack shaft part and a ball screw shaft part are joined to each other by friction welding, coaxiality of a portion having a rack shaft part and a portion having a ball screw shaft part is improved. In a state where a gripped portion 56 formed on the screw shaft part 29 is gripped by a first gripping tool 57 for centering, and a rack shaft part 28 is gripped by a second gripping tool 58 for centering, end portions in the axial direction of the rack shaft part 28 and the screw shaft part 29 are abutted to each other while the screw shaft part 29 and the rack shaft part 28 are relatively rotated by rotating the first gripping tool 57, so that the rack shaft part 28 and the screw shaft part 29 are joined to each other by friction welding.

A massage system for a seat of a vehicle includes a drive motor, a sliding member having a hollow pillar shape, a first end of the sliding member being blocked by a plate member and a second end of the sliding member being opened, a housing member having a hollow pillar shape, a first end of the housing member being blocked by a partition and a second end of the housing member being opened, and a drive gear module operably connected to the drive motor, wherein at least one roller member is extended toward the housing member at an edge of the plate member, and at least one cam protruding toward the sliding member is formed at a circumference of the partition, wherein a cam profile is formed at a surface of the cam.

A mobile baling machine including a rotary input shaft connected by way of a driveline to a rotatable flywheel; and a drive converter that converts rotation of the flywheel to reciprocal rectilinear motion of a plunger, in a bale-forming chamber forming part of the baling machine, in manner forming plant matter in the bale-forming chamber into a compressed form; the driveline including one or more clutches for controlledly transferring rotary drive between the input shaft and the flywheel, wherein the driveline includes a transmission including driveline components defining at least first and second selectable transmission ratios between the input shaft and the flywheel; and wherein the baling machine includes or is operatively connected to one or more controllers that selectively engage a relatively lower, first said transmission ratio or a relatively higher, second said transmission ratio in dependence on conditions prevailing in the baling machine.

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.

A drive device for a high pressure cleaning appliance includes a motor, the motor shaft of which is rotatably mounted on a motor flange and is coupled to a swash plate arrangement by a planetary gearing, wherein the planetary gearing comprises a sun gear, which is connected to the motor shaft in a rotationally-fixed manner and meshes with planetary gears that are rotatably mounted on a planet carrier and are in engagement with an internally toothed ring gear, and wherein the swash plate arrangement is positioned in an oil housing. So that the drive device has a longer service life and enables a greater selection of materials in the production thereof, the motor flange and the oil housing form separate components, wherein the motor flange comprises the ring gear and the oil housing is fixed to the motor flange, wherein the motor flange forms a centering for the oil housing.

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.

Various embodiments are described herein for methods and devices that relate to a drive mechanism that can be used in an external heat engine to control the motion of the pistons and obtain increased engine power and/or efficiency. Through control of the piston motion a non-sinusoidal piston motion can be generated which can improve engine performance by enabling an engine to more closely follow an ideal thermodynamic cycle.