A speed reducing device includes a motor and a speed reducing mechanism. The speed reducing mechanism includes at least one roller assembly, a cycloid disc, at least one fixing disc and a positioning assembly. The roller assembly is disposed within a rotor portion of the motor. While the roller assembly is rotated with the rotor portion, the roller assembly is eccentrically revolved. The roller assembly includes a wheel disc and at least one roller. The cycloid disc includes a main body and at least one cycloid tooth structure. The cycloid tooth structure is protruded from an outer periphery of the main body and in contact with the corresponding roller. While the roller assembly is eccentrically revolved, the at least one cycloid tooth structure is pushed against the corresponding roller, so that the cycloid disc is correspondingly rotated.

A speed reducing device includes a motor and a speed reducing mechanism. The speed reducing mechanism includes at least one roller assembly, a cycloid disc, at least one fixing disc and a positioning assembly. The roller assembly is disposed within a rotor portion of the motor. While the roller assembly is rotated with the rotor portion, the roller assembly is eccentrically revolved. The roller assembly includes a wheel disc and at least one roller. The cycloid disc includes a main body and at least one cycloid tooth structure. The cycloid tooth structure is protruded from an outer periphery of the main body and in contact with the corresponding roller. While the roller assembly is eccentrically revolved, the at least one cycloid tooth structure is pushed against the corresponding roller, so that the cycloid disc is correspondingly rotated.

An Engine with Isochoric Combustion has pistons arranged within cylinders, connecting rods connected to the pistons and to upper joints of triangle links, and a crankshaft with crankpins offset from the centerline of the crankshaft by crank arms. The triangle links are connected to the crankpins at additional joints of the triangle links. Radius links are pivotally connected to the engine by pivot pins at one end and to the triangle links at a further joint of the triangle links at their other end. By way of geometry of the linkages defined by the crank arms, the triangle links, the radius links, and the connecting rods, and by way of the relative positions of the crankshaft, the cylinders, and the pivot pins, during a crank angle segment, the Cylinder Volume during the combustion event is characterized by an extended dwell.

An Engine with Isochoric Combustion has pistons arranged within cylinders, connecting rods connected to the pistons and to upper joints of triangle links, and a crankshaft with crankpins offset from the centerline of the crankshaft by crank arms. The triangle links are connected to the crankpins at additional joints of the triangle links. Radius links are pivotally connected to the engine by pivot pins at one end and to the triangle links at a further joint of the triangle links at their other end. By way of geometry of the linkages defined by the crank arms, the triangle links, the radius links, and the connecting rods, and by way of the relative positions of the crankshaft, the cylinders, and the pivot pins, during a crank angle segment, the Cylinder Volume during the combustion event is characterized by an extended dwell.

An electric work machine includes a brushless motor including a stator including a stator core, an electrical insulator located on the stator core, and at least one coil wound around the stator core with the electrical insulator in between, and a rotor rotatable with respect to the stator, and an output unit drivable by the brushless motor. The stator core has a through-hole and/or a recess to lock rotation of the stator with a screw.

A hedge trimmer comprises: a drive motor (30, 130) disposed in a casing (21, 121); a gear mechanism disposed in the casing (21, 121) and connected to the drive motor (30, 130); and a blade arrangement having at least one cutter bar (20, 120). The at least one cutter bar (20, 120) is driven in a reciprocating manner in a longitudinal direction of the blade arrangement by the drive motor (30, 130) via the gear mechanism. The gear mechanism contains at least a first gear setting and a second gear setting producing two different gear-ratios, such that the at least one cutter bar (20, 120) is adapted to be driven at a first speed and torque using the first gear setting, and a second speed and torque different from the first speed and torque using the second gear setting. By providing two different trimming output modes, the hedge trimmer may provide either a high-speed/small-torque trimming capability or a low-speed/large-torque trimming capability to accommodate requirements under different operation circumstances.

A hedge trimmer comprises: a drive motor (30, 130) disposed in a casing (21, 121); a gear mechanism disposed in the casing (21, 121) and connected to the drive motor (30, 130); and a blade arrangement having at least one cutter bar (20, 120). The at least one cutter bar (20, 120) is driven in a reciprocating manner in a longitudinal direction of the blade arrangement by the drive motor (30, 130) via the gear mechanism. The gear mechanism contains at least a first gear setting and a second gear setting producing two different gear-ratios, such that the at least one cutter bar (20, 120) is adapted to be driven at a first speed and torque using the first gear setting, and a second speed and torque different from the first speed and torque using the second gear setting. By providing two different trimming output modes, the hedge trimmer may provide either a high-speed/small-torque trimming capability or a low-speed/large-torque trimming capability to accommodate requirements under different operation circumstances.

A linear electro-mechanical actuator assembly includes a linear actuator having an output rod end, and a bell crank assembly having a bell crank that is rotatable around a central axis and that has a rod connection opening for receiving the rod end. The bell crank further includes a tube opening along the central axis for receiving a torque tube. First and second bearing plates are positioned on opposite sides of the bell crank, whereby the bank crank rotates relative to the first and second bearing plates. A connection pin provides a hinge connection of the rod end to the bell crank such that linear motion of the rod end imparts rotational motion to the bell crank. The bell crank includes bearing supports positioned on opposite sides of the bell crank body. Circular bearings are positioned within the bearing plates, and around the bearing supports, to support the rotational motion of the bell crank.

A linear electro-mechanical actuator assembly includes a linear actuator having an output rod end, and a bell crank assembly having a bell crank that is rotatable around a central axis and that has a rod connection opening for receiving the rod end. The bell crank further includes a tube opening along the central axis for receiving a torque tube. First and second bearing plates are positioned on opposite sides of the bell crank, whereby the bank crank rotates relative to the first and second bearing plates. A connection pin provides a hinge connection of the rod end to the bell crank such that linear motion of the rod end imparts rotational motion to the bell crank. The bell crank includes bearing supports positioned on opposite sides of the bell crank body. Circular bearings are positioned within the bearing plates, and around the bearing supports, to support the rotational motion of the bell crank.

A linear drive assembly configured for use within a power end assembly. The linear drive assembly is configured to interconnect a crankshaft and a pony rod and comprises a crosshead assembly attached to a connecting rod assembly. In one or more embodiments disclosed herein, the connecting rod assembly is configured to attach to opposite sides of the crosshead assembly so that no portion of the connecting rod assembly is disposed within an interior of a crosshead included in the crosshead assembly.