A linear drive mechanism includes a drive gear connected to an actuator. A first assembly is connected to the drive gear. The first assembly includes a first plurality of leadscrew assemblies connected to a first output link of the drive mechanism. A second assembly is connected to the drive gear. The second assembly includes a second plurality of leadscrew assemblies connected to a second output link of the drive mechanism. The first output link is positioned opposite the second output link and the first assembly and the second assembly are located between the first output link and the second output link.

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 transmission mechanism includes: a main shaft, a power input member, a gear component, and a one-way transmission component. The gear component is arranged on the main shaft. The one-way transmission component is sleeved on the main shaft. The one-way transmission component is connected with the power input member and the gear component. The one-way transmission component enables the gear component to perform one-way transmission under the action of the power input member. The gear component is connected with a power output member in a transmission way to change a rotation speed transmitted from the power input member to the power output member. The power input member performs reciprocating motion with the main shaft as an axis to drive the power output member to move. By arranging the one-way transmission component, the transmission mechanism can perform arc reciprocating motion, thereby improving transmission efficiency.

A reciprocating tool employs a motor gear of a drive motor to rotate a drive shaft. When the drive shaft rotates, a sliding member disposed into a ball rolling groove will move along the path of the ball rolling groove. At the same time, for the restriction of annular fixing member, the component force of the sliding member in an axial direction pushes a driven shaft to move back and forth repeatedly along the axial direction, so that a tool fixed on the driven shaft will also back and forth repeatedly in the axial direction, and thus a high efficient reciprocating tool is achieved.

An actuation mechanism for a surgical instrument (100) includes a sleeve (202) configured to receive the surgical instrument and including one or more parts (208, 210, 226), with studs (250, 252) provided on each part, on some parts only, or distributed over the different parts. At least two wheels (204, 206) are mounted on the sleeve on either side of the part or parts, each wheel being equipped with at least one groove (242) and a mechanical transmission element (244). The groove of each wheel movably receives one of the studs in the groove. At least two drive shafts (212, 214), each being equipped with a first mechanical transmission element (254), cooperate with the mechanical transmission element (244) of one of the wheels.

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.

An improved internal combustion engine utilizes at least one orbital body with at least one orbiting rod journal offset and engaged in a specific way from the center of orbiting body. Further, orbiting body together with orbiting rod journal and one of the gears as one body, rotationally linked to the block via stationary second gear engaged in 1:1 ratio. Which transfers the rotation to main journal via flying arm. Such that radial motion of flying arm transfers the rotation to the main crankshaft axis and constitute one body. This results in a constant volume compression period of max. 60° , improving operation, efficiency and cleanliness of the engine.

A transmission device for a power-driven cutting tool includes a base, a transmission component, a linking component, a shaft component and a link component. The base has a through cavity, a sleeve and a receiving portion. The transmission component is penetratingly disposed in the through cavity, so as to couple the transmission component and the base together. The linking component is penetratingly disposed in the sleeve, so as to couple the linking component and the base together. The shaft component and the link component are disposed in the base. A power source drives the linking component and thereby sequentially drives the shaft component, link component, and transmission component, allowing a cutter of the power-driven cutting tool to undergo reciprocating displacements along a linear path for performing a cutting operation. The transmission device features enhanced structural rigidity, allowing the cutter to move back and forth along a linear track.

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.

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.