Abstract: A thrust converting mechanism has a shaft provided with a pair of helical mated portions, formed in mutually opposing directions; a pair of linear motion members having mating portions for engaging, respectively, the pair of mated portions; a case for supporting the pair of linear motion members so as to enable movement along the shaft, and for bearing the shaft rotatably; a rocking member that is borne on one of the linear motion members of the pair, and for engaging with the other linear motion member of the pair, and for rocking through relative motion of the shaft in respect to the case; and a moving member, supported on the case, that engages with the rocking member to move, through rocking of the rocking member, in a direction that crosses the shaft.

Abstract: One aspect of the present invention is related to a ball socket assembly that includes a housing with an inner bore and at least one open end. The ball socket assembly also includes a ball stud which is partially received in the inner bore of the housing. An exit bearing supports the ball stud and is positioned in the inner bore adjacent the at least one open end. The exit bearing includes a plastic piece and a metal piece which are connected with one another. The metal piece has a semi-conical shape. The housing is deformed adjacent the at least one open end to capture the exit bearing within the inner bore. In operation, the metal piece reinforces the plastic piece to transfer forces between the ball stud and the housing.

Abstract: A steering system includes an arm, a knuckle, a joint, and a steering sensor. The arm defines a first passage. The knuckle has a knuckle arm defining a second passage. The joint has a ball portion and a shaft portion extending. The ball portion is disposed within the first passage and the shaft portion is disposed within the second passage. The ball portion defines a conical recess that has an opening at an upper end of the ball portion and terminates inside the ball portion with a pocket. The steering sensor has a driveshaft extending along a longitudinal axis into the conical recess. The driveshaft includes a head that engages with the pocket. The ball portion is configured to pivot within the first passage relative to the longitudinal axis and the head. The joint and the driveshaft are configured to rotate together about the longitudinal axis as the knuckle is turned.

Abstract: A compliant foil thrust bearing subassembly comprising: a fluid plate comprising an annular mating ring and a plurality of fluid foil elements disposed radially inwardly from the fluid plate mating ring; a force transfer plate comprising an annular mating ring and a plurality of force transfer elements disposed radially inwardly from the force transfer plate mating ring; and a spring plate comprising an annular mating ring and a plurality of deflection elements disposed radially inwardly from the spring plate mating ring, wherein: the fluid plate, the force transfer plate and the spring plate are stackable such that each fluid foil element is axially supported by a corresponding pair of overlapping force transfer elements and deflection elements.

Abstract: Embodiments of the invention relate to bearing apparatuses in which one bearing surface of the bearing apparatus includes diamond, while another bearing surface includes a non-diamond superhard material (e.g., silicon carbide). For example, a bearing apparatus may include a bearing stator assembly and a bearing rotor assembly. The bearing stator assembly and bearing rotor assembly each include a support ring and one or more superhard bearing elements generally opposed to one another. The bearing surface(s) of the rotor or stator may include diamond, while the bearing surface(s) of the other of the rotor or stator do not include diamond. Another bearing apparatus may include both thrust- and radial bearing components. The generally opposed thrust-bearing elements may include diamond, while the generally opposed radial bearing elements may not include diamond, but include a non-diamond superhard material, such as silicon carbide.

Abstract: A deep groove ball bearing having an inner ring, an outer ring and a plurality of rolling elements set between the inner and outer rings. The rolling elements have a diameter DW?0.5H1, up to DW?0.35H1. H1 is the radial dimension of the bearing in the sense of thickness and is numerically equal to half of the difference between the outer diameter and inner diameter of the bearing.

Abstract: The bearing component comprises an external cylindrical member having an outer bearing surface and an inner cavity, and internal cylindrical member, arranged in the inner cavity of the external cylindrical member and substantially coaxial thereto. The external cylindrical member and the internal cylindrical member form a gap therebetween. A resilient damping feature is arranged in the gap.

Abstract: A linear guideway, a sliding module thereof, and a circulation seat thereof are provided. The circulation seat has an inherently one-piece structure, which includes two turning portions, a middle retaining portion, and two lateral retaining portions. The middle retaining portion has a two-stepped structure, which includes a connection bar and a limiting bar that is connected to the connection bar. The connection bar is connected to and arranged between the two turning portions, and a distance between two long lateral surfaces of the connection bar gradually increases along a direction away from the limiting bar. The two lateral retaining portions are connected to and arranged between the two turning portions, and the two lateral retaining portions are respectively located at two opposite sides of the middle retaining portion.

Abstract: A pinion shaft assembly for operation in a power end of a reciprocating pump includes a tubular member coupled to first pinion gear member via an interference coupling extension, possibly having a protruding alignment key operable to engage a slot formed on an inner wall of the first end of the tubular member to ensure correct rotational orientation of the first pinion gear member and the tubular member and to help prevent rotation of the first pinion gear member relative to the tubular member. The tubular member is also coupled to a second pinion gear member via an interference coupling extension, possibly having a protruding alignment key operable to engage a slot formed on an inner wall of the second end of the tubular member to ensure correct rotational orientation of the second pinion gear member and the tubular member and to help prevent rotation of the second pinion gear member relative to the tubular member.

Abstract: A drive shaft has a tubular member extending between axial ends and being hollow. The tubular member is formed of a thermoplastic matrix with embedded fibers. At least one ring member is positioned radially of the tubular member. A method is also disclosed.

Abstract: A rotary phase separator for a space environment includes a housing defining a separator chamber therein and a shaft located along a longitudinal axis of the rotary phase separator and inside the housing. Relative motion between the housing and the shaft about the longitudinal axis urging separation of gas and liquid from a two-phase liquid and gas fluid in the separator chamber. One or more magnetic bearing assemblies are supportive of the shaft relative to the housing.

Abstract: A position sensor includes a plurality of E-shaped ferromagnetic cores arranged to define a circular opening therethrough to receive a shaft. Each E-shaped ferromagnetic core has a plurality of teeth, wherein adjacent E-shaped ferromagnetic cores of the arranged plurality of E-shaped ferromagnetic cores have an overlapping tooth. The position sensor further includes a frame surrounding the arranged plurality of E-shaped ferromagnetic cores, with the E-shaped ferromagnetic cores coupled to the frame.

Abstract: A lubricant injector includes a lubricant inlet, a lubricant outlet, a control piston and a metering piston. The control piston is configured to conduct lubricant from the lubricant inlet to the metering piston, and the metering piston is configured to pump the lubricant provided by the control piston to the at least one lubricant outlet. The metering piston includes a first metering chamber and a second metering chamber that are each connected to the at least one lubricant outlet. The lubricant injector further includes first and second lubricant channels, and in a first switching state of the control piston the lubricant inlet is connected via the first control space to the first lubricant channel and the second metering chamber, and in a second switching state the lubricant inlet is connected via the second control space to the second lubricant channel and the first metering chamber.

Abstract: A rotational coupling including a bearing assembly including a first race rotatably coupled to a second race, wherein the first race is configured to receive a plurality of first fasteners to couple the first race and the bearing assembly to a fluid supply. The rotational coupling also including a connection flange coupled to the second race and configured to receive a plurality of second fasteners to couple the connection flange to the second race. The second race includes a first side facing the connection flange and a second side opposite the first side and facing the first race, wherein the second race includes at least one access aperture configured to enable access to the plurality of first fasteners from the first side to removably couple the bearing assembly to the fluid supply.

Abstract: An assembly including an outer member; an inner member; and a tolerance ring disposed between the inner member and the outer member, wherein the tolerance ring is a split ring comprising opposing edges, where the edges engaged with at one of the inner member or the outer member so as to prevent or restrict movement between the tolerance ring and at least one of the inner member or the outer member, or where the tolerance ring is deformed as installed between the inner member and the outer member and forms at least one buckled region in the tolerance ring due to an interference fit between the inner member and the outer member, where in an uninstalled state, the buckled region is absent.

Abstract: A hub joint assembly for frictionally connecting a shaft to a connector includes a coupling hub including a collar portion and a flange portion. The collar portion includes a bore having an inner surface that is configured to be positioned adjacent to the outer surface of the shaft. The collar portion further includes an outer surface that may be conical. The flange portion extends from the collar portion and is configured to be coupled with the connector. The hub joint assembly further includes a clamp ring including a bore having an inner surface. The inner surface may be conical and configured to mate with the outer surface of the coupling hub. A passage is defined in the clamp ring and extends from an outer surface of the clamp ring to the inner surface of the clamp ring.

Abstract: The present disclosure relates to a hose quick connection device for a fracturing equipment, comprising: a hose holding and moving mechanism for holding a hose and moving the hose between an initial position and a target position, wherein at the target position, an end of the hose is aligned with a manifold interface; and a controller configured to: receive first orientation information indicating the orientation of the hose from the first sensing device and receive second orientation information indicating the orientation of the manifold interface from the second sensing device; generate a desired motion command for moving the hose to the target position, based on the first orientation information and the second orientation information; and control the hose holding and moving mechanism to execute the desired motion command to move the hose to the target position. The present disclosure further relates to a fracturing equipment comprising the hose quick connection device.

Abstract: Provided is a clutch type driving wheel of an electric scooter. The clutch type driving wheel of the electric scooter includes a wheel body and a power shaft penetrating through the center of the wheel body, wherein a motor power input structure is arranged at one end of the power shaft, a central supporting shaft penetrates through the power shaft, a controlled clutch structure enabling the wheel body to be circumferentially positioned relative to the power shaft or enabling the wheel body to circumferentially rotate relative to the power shaft when the controlled clutch structure acts is arranged between the power shaft and the wheel body, and a clutch state locking structure is arranged on the controlled clutch structure. According to the clutch type driving wheel of the electric scooter, the clutch state locking structure is arranged between the power shaft and the wheel body.

Abstract: A clutch device includes a clutch center and a pressure plate operable to move toward or away from the clutch center and rotatable relative to the clutch center. The pressure plate includes a pressure-side cam portion. The clutch center includes a center-side cam portion. The pressure plate includes a boss extending in movement directions. The clutch center includes a through hole in which a boss is insertable. The through hole extends along circumferential directions and allows movement of the boss along the circumferential directions and the movement directions. While a surface of the pressure-side cam portion and a surface of the center-side cam portion are in contact with each other, a distal end of the boss projects outward from the through hole.

Abstract: A friction engagement device of an automatic transmission is provided with a cylindrical drum part supporting an annular friction plate. The drum part includes a cylindrical body with a spline part having serrations extending in the axial direction and depressed radially outward to fit with the friction plate, in an inner circumferential side surface, a vertical wall part provided at an end side of the cylindrical body and extending radially inward, and a corner part provided between the cylindrical body and the vertical wall part. A drum recess is formed inside the corner part, connected to the serration and depressed toward an axial end side. A cut part is provided outside the corner part, connected to the drum recess, and cut in the circumferential direction of the drum part. The drum recess is opened to an outside by the cut part to form an oil gallery.

Abstract: A method of manufacturing a constituent member of a constant-velocity joint includes: performing plastic working; and performing hardening of a material. The plastic working is performed with a material of the constituent member heated to a predetermined working temperature range. The hardening of the material is performed by utilizing heat applied for heating to the working temperature range in performing the plastic working as heat for the hardening of the material and cooling the material after performing the plastic working.

Abstract: A cage freewheel for installation into the clamping gap of a shaft/hub connection, in particular in an e-bike drive, includes an annular cage with, following one another in the circumferential direction, bearing rollers for mounting the hub and the shaft together, and clamping bodies arranged pivotably in the cage. The clamping bodies block a relative movement between the shaft and the hub in a frictionally locking manner in one rotational direction, and allow rotation in the other rotational direction, and are spring-loaded in the coupling direction by an annular spring which extends around the row of the clamping bodies in a slot in the radially outer surface of the clamping bodies. The bearing rollers are arranged in each case in pairs in associated pockets of the cage on both sides of the annular spring. Here, the bearing rollers are received in a positively locking manner in the associated pockets.

Abstract: A working vehicle includes: a clutch displaceable to a connected state in which power is transmitted to a drive, a disconnected state in which the transmission is disconnected, and a half-clutch state in which power is slidably and partly transmitted to the drive; a detector that detects an operation position of a clutch pedal and outputs a detected value corresponding to the operation position detected; a control device that brings the clutch into the half-clutch state if the detected value corresponds with a threshold, and brings the clutch into the disconnected state if the detected value is less than the threshold and into the connected state if the detected value is greater than the threshold, and vice versa; and a change unit that changes the threshold to a different value in accordance with an operation on the operation member.

Abstract: A control device controls a torque transmission device. The torque transmission device includes an actuator that operates by being energized and a torque transmission portion that is switched to a transmission state or a non-transmission state by the actuator operating, and transmits a torque between a first transmission portion and a second transmission portion when the torque transmission portion is in the transmission state. The control device includes a target calculation unit, a mode determination unit, and a control unit. The target calculation unit calculates a target transmission torque that is a torque to be transmitted between the first transmission portion and the second transmission portion. The mode determination unit determines an operating mode among an engagement mode, a release mode, and a steady mode. The control unit controls the actuator based on the operating mode determined by the mode determination unit.

Abstract: A brake dust particle filter for a brake caliper of a disc brake assembly, wherein the brake caliper comprises a lining inspection opening, closes in a mounted state thereof the lining inspection opening at least partially with precise fit. The brake dust particle filter is provided with a filter medium support that supports a filter medium. A brake caliper provided with the brake dust particle filter in the lining inspection opening is arranged across the brake disc of the disc brake assembly.

Abstract: A tool for retracting pistons into cylinder bores is disclosed. A plurality of centering cones are provided to engage with a multitude of piston sizes and configurations. A user selects an appropriately sized centering cone and engages the selected centering cone with a spring loaded distal pusher portion of said tool. A female threaded collar and spreader plate combination receives a male threaded thrust bolt. The male threaded thrust bolt carries the spring loaded distal pusher portion. The spreader plate is pressed against a face of the caliper assembly, and rotation of the male threaded thrust bolt by a driver, such as a ratchet wrench or impact gun, applies inward and rotating forces from the spring loaded distal pusher portion of said tool to the piston, while separating the spring loaded distal pusher portion of said tool from the spreader plate.

Abstract: A brake disc includes an outer circumferential portion including a waveform portion having recessed portions and projecting portions repeatedly formed over an outer circumference, and for the outer circumferential portion to have substantially uniform heat capacity distribution in a circumferential direction and in a radial direction, the outer circumferential portion is formed such that a ratio of a difference in heat capacities among a plurality of circumferential sections in the outer circumferential portion, which are sectioned at an equal angle in the circumferential direction, relative to a heat capacity of each circumferential section is equal to or less than a first predetermined ratio. A ratio of a difference in heat capacities among radial sections in the outer circumferential portion, which are sectioned to have an equal length in the radial direction, relative to a heat capacity of each radial section is equal to or less than a second predetermined ratio.

Abstract: A component of a brake for a vehicle, having a metallic base body with a surface provided with a coating which includes an intermediate layer lying on the base body and a covering layer lying on the intermediate layer. The covering layer is formed from a stainless steel matrix with hard material particles embedded therein. The hard material particles embedded in the stainless steel matrix have an average grain diameter of 10-125 ?m and have a non-melted core region consisting of uninfluenced material of the hard material particles, which core region is surrounded at least in sections by a mixing zone formed from material of the stainless steel matrix and material of the respective hard material particle, via which mixing zone the hard material particles are in each case materially bonded to the stainless steel matrix. Also, a method by which a component coated in this way is produced.

Abstract: A rubber elastic bearing for securing a drive unit in a motor vehicle in an uncoupled manner. The bearing can be assembled between as housing of a drive unit and a support component, and the bearing can be held at least indirectly in the support component in a form-fitting manner. A joining aid for the bearing is provided such that a secure joint of the form-fitting connection with the support component can be achieved.

Abstract: A formation method for liquid rubber composite nodes with middle damping holes is provided. The formation method includes adding a middle spacer sleeve between an outer sleeve and a mandrel, bonding the middle spacer sleeve and the mandrel together through rubber vulcanization, and assembling the integrated middle spacer sleeve and the mandrel into the outer sleeve; forming damping through holes which penetrate through the mandrel on the mandrel; hollowing the middle spacer sleeve to form a plurality of spaces; after vulcanization, forming a plurality of interdependent liquid cavities by using rubber and the plurality of spaces; and arranging liquid in the plurality of liquid cavities and communicating the plurality of liquid cavities through the damping through holes.

Abstract: The present disclosure is an electromagnetic force control method of a magnetic disk type negative stiffness electromagnetic actuator. The present disclosure relates to the technical field of vibration control. According to the actually required static bearing capacity, the present disclosure determines the positive stiffness k of a mechanical spring required for a magnetic disk type quasi-zero stiffness vibration isolator; and establishes an electromagnetic force mathematical model of a single electromagnet under a condition of magnetic unsaturation.

Abstract: A motor and a personal-care device having the motor. The motor has a motor carrier made at least partially from a sheet metal material, a movable motor part, and a spring element that couples the movable motor part with the motor carrier. The sheet metal material comprises at least one coupling area where the sheet metal material is folded so that its two layers are facing each other while each of the two layers comprises a slot, the slots being aligned with one another. A connection extension of the spring element extends through the aligned slots.

Abstract: End members are supportable along a damper housing and dimensioned for securement to flexible spring member. End members include a wall with a side wall portion including an inner side surface portion. First projections extend toward a first inner edge with a first shoulder surface portion faces a second end. Second projections extend inward beyond the inner side surface portion toward a second inner edge with a second shoulder surface portion facing a first end. Second projections are spaced axially from first projections such that a groove is formed inward of the inner side surface portion between first and second shoulder surface portions. End member assemblies including such an end member as well as gas spring and damper assemblies and suspension systems are also included.

Abstract: An active control anti-yaw damper (100) is provided. When a piston (2) of the active control anti-yaw damper (100) reciprocates inside a hydraulic cylinder (1), an interior of the hydraulic cylinder (1) is divided into two cylinder blocks (PA, PB) which communicate with an oil reservoir through two main oil lines respectively to form a primary loop between the hydraulic cylinder (1) and the oil reservoir; a reversing valve (PV3) is installed between the two main oil lines and the oil reservoir and is configured to change a flow direction of the primary loop when the active control anti-yaw damper (100) is in an active mode and adjust a displacement of the piston (2) within the hydraulic cylinder (1).

Abstract: A suspension system includes a first suspension member movable relative to a second suspension member, a fluid reservoir having a volume, the volume variable in response to a relative movement between the first and second suspension members, and a fluid flow circuit having a first end in fluidic communication with the fluid reservoir and a second end in fluidic communication with an isolated suspension location, the fluid flow circuit comprising a first valve, a second valve and a third valve, wherein said first and third valves are in parallel with each other and the second valve is in series with each of the first and third valves.

Abstract: A rope fixing apparatus for use in pleated or honeycomb curtain systems for all kinds of stable, movable or folding windows, doors and glass balconies.

Abstract: A hook assembly has a hook body with a shank portion and a free end portion defining a hook opening. The free end portion has a tip end with a through passage, and a key slot formed in the through passage. A removable pin is received in the through passage to substantially close an open side of the hook opening to retain items within the hook opening. The pin has a protrusion that mates with the key slot when the pin is rotated to a first position to allow the pin to be received in and removed from the through passage. The protrusion serves as a locking structure to prevent the pin from being removed from the through passage when the pin is rotated away from the first position. A spring retainer is arranged to keep the pin in its locked position.

Abstract: A gear assembly includes a first gear wheel including a first gear wherein a plurality of teeth of the first gear are oriented in a first direction and a second gear wherein a plurality of teeth of the second gear are oriented not-parallel to the primary axis. A second gear wheel is configured to match the second gear of the first gear wheel including an outer gear and an inner gear wherein a plurality of teeth of the inner gear are oriented parallel to the plurality of teeth of second gear. A retention member can be used to secure the second gear wheel on the first gear wheel.

Abstract: A linear actuator assembling method includes a semi-finished product assembling step and a threaded shaft assembling step. The semi-finished product assembling step is to form a semi-finished product, and the semi-finished product includes a case, a main gear, and a main gear bearing. The main gear and the main gear bearing are surrounded and restricted by the case, and the main gear bearing is sleeved on the main gear. In the threaded shaft assembling step, a threaded shaft is reversely assembled, and one end of the threaded shaft is inserted into the main gear to allow the end of the threaded shaft to be restricted by the main gear.

Abstract: Disclosed is an 8-speed gearbox for a dual clutch transmission, with a particular gear arrangement of the gears on the countershaft, wherein the speed or reverse gear of a gear pair that is a permanently rotationally and axially fixed gear is the radially smaller of the gear pair. One or two cluster gears may be provided, each cluster gear having two gears axially paired attached to the countershaft by a shrink fit connection.

Abstract: A module for a system for driving and synchronizing a countershaft of a transmission gearbox. The module includes a coupling device having an input element intended to be rotationally coupled to a reversible electric machine and an output element intended to be rotationally coupled to the countershaft. The coupling device has a coupled state in which the clutch device is able to transmit torque between the input element and the output element and an uncoupled state in which the input element and the output element are uncoupled. Also included is a lock-up device which has a lock-up state in which said lock-up device blocks the rotation of the input element of the clutch device, and a released state in which said lock-up device allows the input element to rotate.

Abstract: An axle assembly having a drop gear set and a countershaft transmission. The drop gear set may operatively connect a rotor of an electric motor to a countershaft. The countershaft transmission may operatively connect the countershaft to a drive pinion. The electric motor and the countershaft transmission may be positioned on opposite sides of a differential assembly.

Abstract: A multi-speed transmission including a plurality of planetary gearsets and a plurality of selective couplers to achieve at least nine forward speed ratios and at least nine reverse speed ratios is disclosed. The plurality of planetary gearsets may include a first planetary gearset, a second planetary gearset, a third planetary gearset, a fourth planetary gearset, and a fifth planetary gearset. The plurality of selective couplers may include a number of clutches and a number of brakes. The multi-speed transmission may have five planetary gearsets and eight selective couplers. The eight selective couplers may include three clutches and five brakes.

Abstract: A system for stopping rotation of a first gear and a second gear on a shaft, The first gear and second gear are concentric and rotatable about said shaft. The first gear and the second gear are driven by the same input system and the first gear and the second gear are configured to rotate at differential speeds and independently to each other. The first gear comprises a first end stop and the second gear comprises a second end stop and the first end stop and the second end stop are configured to engage each other when the first gear and the second gear have each rotated a predetermined number of turns. Engagement of the first end stop with the second end stop is configured to prevent rotation of the first gear and the second gear and cause a stall in the system.

Abstract: The present invention is directed to a self-locking non-backdrivable gear system. The gear system may comprise a primary motor input and gear box. The primary motor input is for rotation of the gearbox about the axis of a drive shaft. The gearbox may comprise an input ring gear, one or more locking gears, fixed gear, and output gear. In operation, rotation of the primary motor input causes rotation of the ring gear which causes rotation of the locking gear which causes rotation of the output gear which causes rotation of the drive shaft. However, in the absence of rotation of the ring gear, a rotational force applied to the output gear causes the gear teeth on the fixed and output gears to lock the gear in place.

Abstract: A powertrain for an electric vehicle includes: a planetary gear including a first rotating element, a second rotating element, and a third rotating element, where the first rotating element is connected to a first shaft, the second rotating element is connected to a second shaft, and the third rotating element is selectively connected to a transmission housing; a first motor supplying power to the first shaft at all times; and a second motor selectively supplying power to the first shaft and the second shaft. Two rotating elements among the first, second, third rotating elements of the planetary gear are selectively connected to integrally rotate the entire planetary gear.

Abstract: A flow channel structure forms a first flow channel which makes a first fluid chamber and a second fluid chamber communicate with each other therethrough. The flow channel structure includes first to third plates. The first plate includes a first through hole penetrating the first plate in a thickness direction to open to the first fluid chamber. The second plate includes a second through hole penetrating the second plate in the thickness direction to open to the second fluid chamber. The third plate includes a first connecting through hole penetrating the third plate in the thickness direction. The first connecting through hole is larger in flow channel area than each of the first and second through holes. The first and second through holes are disposed in different positions from each other as seen in the thickness direction. The first connecting through hole communicates with the first and second through holes.

Abstract: A transmission (21) as a power transmission device for a vehicle comprises an input shaft (22), an output shaft (23), and a planetary continuously variable transmission mechanism (31). The planetary continuously variable transmission mechanism (31) comprises a planetary gear mechanism (32), a pump side clutch (33), a hydraulic pump (36), a hydraulic motor (38), and a motor side clutch (40). The hydraulic pump (36) and the hydraulic motor (38) are connected via a pair of main lines (37A, 37B). When the transmission (21) is switched from a traveling state to a neutral state, at least one clutch (33, 40) of the pump side clutch (33) and the motor side clutch (40) is released.

Abstract: A four-mode dual-motor coupled electric drive axle, including a primary drive motor, an auxiliary drive motor, a reducer, a torque vectoring (TV) coupler, a power coupling differential, a housing, and a power output mechanism. The TV coupler is switchable among disconnected mode, TV mode, and reducer mode by controlling a first clutch and a second clutch. The power coupling differential is switchable between torque coupling mode and speed coupling mode by controlling a third clutch. The electric drive axle is switchable among single-motor drive mode, TV drive mode, dual-motor torque coupling drive mode, and dual-motor speed coupling drive mode by controlling the TV coupler and the power coupling differential.

Abstract: Harmonic drives are used widely in robotics as a method for achieving high gear reductions and for driving force transmissions. The harmonic drive is made a three components: a wave generator, a flexspline, and a circular spline. Embodiments described flexsplines for a metal strain wave gearing. The cup of the flexspline is free from sharp edges and with a rounded bottom with a curvature maximized based on the geometry of the flexspline. Compared to a steel flexspline, implementations of flexsplines will have the same outer diameter, the same number of teeth and profile, the same input shaft/base, the same wall thickness near the teeth, but comprise a rounded bottom where the input shaft/base transitions to the straight wall of the flexspline, providing improved performance of BMG flexsplines by reducing low cycle fatigue failures due to stress concentrations.