A power-driven reciprocating tool may include a transmission mechanism that converts rotational force from a motor to linear force to be output by a reciprocating mechanism coupled thereto, and a counterbalancing mechanism coupled to the transmission mechanism to counter-balance forces generated by the reciprocating mechanism. The transmission mechanism may include a planetary gear assembly including a sun gear in meshed engagement with at least one planet gear. In response to a force converted by and transmitted from the transmission mechanism, the reciprocating mechanism may move in a first linear direction, and the counterbalancing mechanism may move in a second linear direction, opposite the first linear direction. The opposite linear movement of the reciprocating mechanism and the counterbalancing mechanism may counteract forces generated by the reciprocating motion of the reciprocating mechanism, thus reducing vibration output by the tool.

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.

A slider-crank mechanism includes a slider, a shaft, and a drive train correlating reciprocation of the slider with continuous rotation of the shaft. The slider reciprocates along a slider axis with respect to a slider surface. The drive train includes a linear actuator connected to the slider for substantially pure collinear movement with the slider to substantially eliminate side forces between the slider and slider surface. The slider and drive train may include a rack-and-pinion configuration. The rack-and-pinion may drive or be driven by a Grashofian four-bar crank-rocker linkage that includes a rocker arm, floating link, web, and the shaft. The slider-crank mechanism may be employed in a power generation system such as an internal combustion engine or a power consuming system such as a compressor or pump.

An adapter assembly for connecting an end effector to a surgical instrument includes first, second, and third drive assemblies configured for converting rotational motion into linear motion. Each of the second and third drive assemblies includes a cam assembly for longitudinally advancing and retracting respective second and third drive members.

An actuator for a latch is provided, the actuator having: a motor operatively coupled to a gear train; and a rack moveably mounted to the actuator for linear movement with respect to a housing of the actuator, wherein the gear train comprises: a worm; a worm gear and a pinion gear, wherein the pinion gear is rotatably mounted to the worm gear and the pinion gear has a plurality of teeth configured to engage a portion of the rack, wherein the axis of rotation of the worm is perpendicular to the axis of rotation of the worm gear and the pinion gear.

An electrical clamping apparatus is provided that can reduce an entire size using a motor as a driving source and largely improve a grip torque by applying a sliding crank portion and a changed toggle link portion with a driving force transfer mechanism. The electrical clamping apparatus for clamping and fixing one side of a panel includes a main body; a driving motor installed within the main body and that generates a driving force; a clamp portion that clamps or unclamps the panel; a toggle link portion connected to the clamp portion and that transfers rotatory power to the clamp portion to rotate the clamp portion; a driving force transfer portion connected to the driving motor to transfer a driving force of the driving motor to the toggle link portion; and a sliding crank portion connected to one side of the toggle link portion to convert a rotational motion of the driving force transfer portion to a linear reciprocating motion and to operate the toggle link portion in a state in which one side thereof is connected to the driving force transfer portion and in which the other side thereof is vertically bent toward the toggle link portion.

A mechanical type lifting shifter provided below a wheelchair body, including a bottom supporting assembly having a pair of oppositely arranged supporting members and gear rack columns provided on the supporting members; a movable upper supporting assembly having movable supporting members slidably sleeving the gear rack columns; a gear roller assembly having a rotating shaft and a pair of lifting gears provided on the two end portions of the rotating shaft; two ends of the rotating shaft are respectively and fixedly connected to a pair of movable supporting members and support the movable supporting members, and the lifting gears are engaged with the gear rack columns; a pedal transmission assembly mounted on the rotating shaft and in transmission connection with the rotating shaft; and a pedal clutch assembly connected to the pedal transmission assembly to switch clockwise and anti-clockwise motion transmission between the pedal transmission assembly and the rotating shaft.

A knife drive assembly for use in a harvesting header is disclosed. The knife drive may be mounted near the center line of the cutter bar of the header. Mechanical power from the power unit behind the header (typically the combine power output shaft) may be translated for application to two knife assembly sections in the cutter bar at the front of the cutter table. Movement of the two knife assembly sections with this apparatus can be fully synchronized and 180 degrees out of phase, to maximize cutting effectiveness and minimize vibration of the header. The unitary drive assembly may allow for rapid repair and manufacture, and the size and weight of the knife drive assembly may represent a significant weight and balance advantage over the prior art.

An electromechanical actuation system for obtaining at least two switching positions is proposed, that has an electric drive (1) for the normal operating mode, and an energy storage unit (2) for the emergency operating mode, which are coupled to an epicyclic gearing (3). The epicyclic gearing (3) is coupled to a movement transferring device (4) that converts a rotational movement into a linear movement in order to obtain the switching positions in the normal operating mode and in the emergency operating mode.

The present invention relates to a twisted string actuator. The present invention may comprise: a drive source; driving parts for receiving power from the driving source; driven parts installed in conjunction with the driving parts and receiving power; strings coupled to the ends of the driving parts and the driven parts so as to be twisted or untwisted, and a driving compensation part installed at the ends of the strings to compensate for uneven actuation of each of the strings.