A mechanical device includes a worm and two swing units disposed in a housing. Each swing unit has a pivot member and a swing member meshing with the worm. The swing member has an arcuate cam slot that has a first end and a second end. A rail is fixed to the housing above the swing units and the worm. Two sliders are connected to the swing units. Each slider has a slide block engaging the rail, an extension arm, and a protrusion protruding from the extension arm and inserted into the arcuate cam slot to slide between the first and second ends of the arcuate cam slot when the worm drives the swing member to swing.

An actuator for the actuation of at least one movable member of a motor vehicle transmission. The actuator includes a housing, at least one electric motor having a stator and a rotor mounted on a rotor shaft extending along an axis X1, a motor pinion fixed to the opposite end of the shaft from the rotor, a circuit board for supplying power to the stator and controlling the electric motor, and a reduction mechanism driven by the motor pinion. The housing defines a first volume in which the electric motor and the circuit board are received. The circuit board is located axially along the axis X1 between the electric motor and the motor pinion. The actuator further includes a cover defining a second volume in which the reduction mechanism is received, the housing and the cover each have guides for guiding the reduction mechanism.

An electromechanical actuator (EMA) includes a plurality of modes and includes an electrical motor having a motor shaft extending along an axis (A) and that drives the shaft to rotate about the axis and a gear assembly mounted around, and in geared connection with the shaft, to rotate with the shaft. The EMA output is connected to the gear assembly such that rotation of the motor shaft causes rotation of the output via the gear assembly, the output rotating at a speed which is a predetermined fraction of the speed of rotation of the motor shaft based on the gear ratio of the gear assembly. The EMA also includes a synchroniser comprising a first conical portion connected to an end of the motor shaft, and a second conical portion connected to a ratchet. The synchroniser has an engaged position and a disengaged position.

A knife drive assembly for use in a harvesting header 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 automatic duck decoy jerk string device 1 having an enclosure 2, a mounting pole 6, a lockable mount 8 for mounting the enclosure 2 at different heights on the mounting pole 6, an electric motor 10 in the enclosure 2, a battery 12 configured to power the electric motor 10, a speed control 13 to control a rotational speed of a motor drive shaft 16, an elongated slider 20 partially inside the enclosure 2 and partially outside the enclosure 2, the elongated slider 20 moves back-and-forth towards the inside of the enclosure and away from the inside of the enclosure, a gear system 14 connected to the motor drive shaft 16 to reduce the rotational speed of the motor drive shaft 16 and rotate a drive arm 18, and a link arm 28 is rotatably mounted to the drive arm 18 and rotatably mounted to the first slider end 22. A method of using the jerk string device to move duck decoys 48 on a jerk line 38 connected to the elongated slider 20.

One aspect of an electric actuator of the present invention includes: a motor having a motor shaft rotatable about a motor axis; a transmission mechanism coupled to one side in the axial direction of the motor shaft; an output shaft extending in the axial direction of the motor shaft and to which rotation of the motor shaft is transmitted via the transmission mechanism; and a rolling member group including three or more rolling members arranged to surround the motor axis. The motor shaft is a hollow shaft. At least a part of the output shaft is located inside the motor shaft. The motor shaft and the output shaft are supported with each other in the axial direction and the radial direction via the rolling member group.

One aspect of an electric actuator of the present invention includes: a motor having a motor shaft rotatable about a motor axis; a transmission mechanism coupled to one side in the axial direction of the motor shaft; an output shaft extending in the axial direction of the motor shaft and to which rotation of the motor shaft is transmitted via the transmission mechanism; and a rolling member group including three or more rolling members arranged to surround the motor axis. The motor shaft is a hollow shaft. At least a part of the output shaft is located inside the motor shaft. The motor shaft and the output shaft are supported with each other in the axial direction and the radial direction via the rolling member group.

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.

This rotating shaft structure comprises a first link, a second link connected to the first link, and a plurality of speed reducers positioned between the first link and the second link. At least one of a speed-reducer-side attachment hole and a first-link-side attachment hole, which are for joining the speed reducers to the first link, is larger or longer than the other.

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.