An exercise device with controllable training modes includes a base, a first exercise mechanism, a second exercise mechanism, and an operating mechanism. The first exercise mechanism has a first gear member. The second exercise mechanism has a second gear member. The operating mechanism has a third gear member. When the third gear member is at a first position, the third gear member meshes with the first gear member and the second gear member to form a linked state, so that the first exercise mechanism and the second exercise mechanism are operatively linked and coupled and swing in opposite directions. When the third gear member is at a second position, the third gear member is disengaged from either the first gear member or the second gear member or both to form a free state, so that the first exercise mechanism and the second exercise mechanism individually swing.

A cycloidal speed reducer including a housing for input and output rotor assemblies. Stationary pin features having a radius are spaced in a housing cavity. The input assembly includes an eccentric hub with an eccentricity equal or greater than the radius, two lobes each rotatably holding a cycloid disk, and an input engagement feature for a drive motor. The cycloid disks each have engagement holes and contact surfaces having truncated-profiles. The output assembly includes a pin disc holding roller pins, and an output engagement feature for a driven device. As rotational motion is input to the cycloidal speed reducer from the drive motor, the input rotor assembly and cycloid disks are rotated, the contact surfaces interact with the stationary pin features, the engagement holes of the cycloid disks interact with the roller pins and the output assembly is rotated, and proportional rotational motion is output to the driven device.

A cycloidal speed reducer including a housing for input and output rotor assemblies. Stationary pin features having a radius are spaced in a housing cavity. The input assembly includes an eccentric hub with an eccentricity equal or greater than the radius, two lobes each rotatably holding a cycloid disk, and an input engagement feature for a drive motor. The cycloid disks each have engagement holes and contact surfaces having truncated-profiles. The output assembly includes a pin disc holding roller pins, and an output engagement feature for a driven device. As rotational motion is input to the cycloidal speed reducer from the drive motor, the input rotor assembly and cycloid disks are rotated, the contact surfaces interact with the stationary pin features, the engagement holes of the cycloid disks interact with the roller pins and the output assembly is rotated, and proportional rotational motion is output to the driven device.

A lift drive system for an energy storage and delivery system includes an electric motor that rotates a driven shaft, a brake assembly for selectively braking the rotation of the driven shaft, and optionally includes a clutch selectively operable to decouple the electric motor from the driven shaft. A steel ribbon is disposed at least partially about and in contact with the driven shaft, where rotation of the driven shaft by the electric motor causes linear movement of the steel ribbon. The steel ribbon can connect at one end to an elevator cage assembly and at an opposite end to a counterweight.

In various embodiments, systems, apparatuses and methods are provided to distribute coolant to an electric motor. The apparatus includes a pan configured with a set of holes for coolant flow; an assembly including a set of bar linkages, a set of discs, and a single actuator motor wherein the assembly is attached to the pan wherein the single actuator motor is linked via bar linkages to discs that enable configuring a planar angle of the pan to obtain an optimum hole location of holes for coolant flow; and in response to external disturbances to the apparatus that redirect the coolant flow from the target region of the electric motor, the single actuator motor is controlled by an algorithm to change the planar angle of the pan to obtain the optimum hole location to direct coolant flow to the target region of the electric motor.

In various embodiments, systems, apparatuses and methods are provided to distribute coolant to an electric motor. The apparatus includes a pan configured with a set of holes for coolant flow; an assembly including a set of bar linkages, a set of discs, and a single actuator motor wherein the assembly is attached to the pan wherein the single actuator motor is linked via bar linkages to discs that enable configuring a planar angle of the pan to obtain an optimum hole location of holes for coolant flow; and in response to external disturbances to the apparatus that redirect the coolant flow from the target region of the electric motor, the single actuator motor is controlled by an algorithm to change the planar angle of the pan to obtain the optimum hole location to direct coolant flow to the target region of the electric motor.

A floating drum turbine is used for generating the electrical energy from the kinetic energy of a water stream (sea wave or river flow) that provides the mechanical energy needed to rotate an electrical generator for generating the electricity. The drum turbine is installed on a buoyant skid anchored to the seabed by some chains/ropes to keep it in a fixed position and direction along the water stream. The turbine is coupled to an electrical generator with a power transmission system, and generates the electricity that is transferred to the coast using a cable system floated on the water surface.

Various embodiments include systems and methods pertaining to a counter-rotating alternator arrangement that may be used to generate electrical energy. In various embodiments, the counter-rotating alternator arrangement may include a plurality of shafts, an alternator assembly, and a rotatable coupling arrangement. According to some embodiments, the rotatable coupling arrangement may include coupling components that are rotatably mated with one another such that a first shaft and a second shaft are aligned along an axis and extend in opposite directions from the rotatable coupling arrangement. The alternator assembly may include multiple rotors, and the counter-rotating alternator arrangement may be configured to rotate a first rotor and a second rotor in opposite rotational directions relative to one another, in accordance with various embodiments.

A hybrid drive unit (HY, G) for a motor vehicle includes a housing (GG), in which a torque converter (TC) and an electric machine (EM) are accommodated. The electric machine (EM) and the torque converter (TC) are arranged directly next to each other such that the electric machine (EM) is arranged at a first face end (TC1) of the torque converter housing (TCG). An oil guide shell (LS) at least partially encompasses a section of the torque converter (TC). The oil guide shell (LS) has an L-shaped cross-section including a first section (LS1) and a second section (LS2) and is arranged in such that the first section (LS1) partially encompasses a second face end (TC2) of the torque converter housing (TCG) and the second section (LS2) partially encompasses a circumferential surface of the torque converter housing (TCG).

A hybrid drive unit (HY, G) for a motor vehicle includes a housing (GG), in which a torque converter (TC) and an electric machine (EM) are accommodated. The electric machine (EM) and the torque converter (TC) are arranged directly next to each other such that the electric machine (EM) is arranged at a first face end (TC1) of the torque converter housing (TCG). An oil guide shell (LS) at least partially encompasses a section of the torque converter (TC). The oil guide shell (LS) has an L-shaped cross-section including a first section (LS1) and a second section (LS2) and is arranged in such that the first section (LS1) partially encompasses a second face end (TC2) of the torque converter housing (TCG) and the second section (LS2) partially encompasses a circumferential surface of the torque converter housing (TCG).